1
|
Tully CA, Alesi S, McPherson NO, Sharkey DJ, Teong XT, Tay CT, Silva TR, Puglisi C, Barsby JP, Moran LJ, Grieger JA, Mousa A. Assessing the influence of preconception diet on male fertility: a systematic scoping review. Hum Reprod Update 2024; 30:243-261. [PMID: 38237150 PMCID: PMC11063564 DOI: 10.1093/humupd/dmad035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/21/2023] [Indexed: 05/03/2024] Open
Abstract
BACKGROUND The last decade has seen increased research on the relationship between diet and male fertility, but there are no clearly defined nutritional recommendations for men in the preconception period to support clinical fertility outcomes. OBJECTIVE AND RATIONALE The purpose of this scoping review is to examine the extent and range of research undertaken to evaluate the effect(s) of diet in the preconception period on male clinical fertility and reproductive outcomes. SEARCH METHODS Four electronic databases (MEDLINE and EMBASE via Ovid, CAB Direct, and CINAHL via EBSCO) were searched from inception to July 2023 for randomized controlled trials (RCTs) and observational studies (prospective/retrospective, case-control, and cross-sectional). Intervention studies in male participants or couples aiming to achieve dietary or nutritional change, or non-intervention studies examining dietary or nutritional components (whole diets, dietary patterns, food groups or individual foods) in the preconception period were included. Controls were defined as any comparison group for RCTs, and any/no comparison for observational studies. Primary outcomes of interest included the effect(s) of male preconception diet on clinical outcomes such as conception (natural or via ART), pregnancy rates and live birth rates. Secondary outcomes included time to conception and sperm parameters. OUTCOMES A total of 37 studies were eligible, including one RCT and 36 observational studies (prospective, cross-sectional, and case-control studies; four studies in non-ART populations) published between 2008 and 2023. Eight reported clinical outcomes, 26 reported on secondary outcomes, and three reported on both. The RCT did not assess clinical outcomes but found that tomato juice may benefit sperm motility. In observational studies, some evidence suggested that increasing fish or reducing sugar-sweetened beverages, processed meat or total fat may improve fecundability. Evidence for other clinical outcomes, such as pregnancy rates or live birth rates, showed no relationship with cereals, soy and dairy, and inconsistent relationships with consuming red meat or a 'healthy diet' pattern. For improved sperm parameters, limited evidence supported increasing fish, fats/fatty acids, carbohydrates and dairy, and reducing processed meat, while the evidence for fruits, vegetables, cereals, legumes, eggs, red meat and protein was inconsistent. Healthy diet patterns in general were shown to improve sperm health. WIDER IMPLICATIONS Specific dietary recommendations for improving male fertility are precluded by the lack of reporting on clinical pregnancy outcomes, heterogeneity of the available literature and the paucity of RCTs to determine causation or to rule out reverse causation. There may be some benefit from increasing fish, adopting a healthy dietary pattern, and reducing consumption of sugar-sweetened beverages and processed meat, but it is unclear whether these benefits extend beyond sperm parameters to improve clinical fertility. More studies exploring whole diets rather than singular foods or nutritional components in the context of male fertility are encouraged, particularly by means of RCTs where feasible. Further assessment of core fertility outcomes is warranted and requires careful planning in high-quality prospective studies and RCTs. These studies can lay the groundwork for targeted dietary guidelines and enhance the prospects of successful fertility outcomes for men in the preconception period. Systematic search of preconception diet suggests that increasing fish and reducing sugary drinks, processed meats and total fat may improve male fertility, while consuming healthy diets, fish, fats/fatty acids, carbohydrates and dairy and reducing processed meat can improve sperm health.
Collapse
Affiliation(s)
- Cathryn A Tully
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
- Repromed, Dulwich, Adelaide, SA, Australia
| | - Simon Alesi
- Monash Centre for Health Research and Implementation (MCHRI), Monash University, Clayton, VIC, Australia
| | - Nicole O McPherson
- Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
- Freemasons Center for Male Health and Wellbeing, The University of Adelaide, Adelaide, SA, Australia
- School of Biomedicine, Discipline of Reproduction and Development, The University of Adelaide, Adelaide, SA, Australia
| | - David J Sharkey
- Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
- School of Biomedicine, Discipline of Reproduction and Development, The University of Adelaide, Adelaide, SA, Australia
| | - Xiao Tong Teong
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
- Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Chau Thien Tay
- Monash Centre for Health Research and Implementation (MCHRI), Monash University, Clayton, VIC, Australia
| | - Thais Rasia Silva
- Postgraduate Program in Endocrinology and Metabolism, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carolyn Puglisi
- School of Agriculture, Food and Wine, Faculty of Sciences, University of Adelaide, Waite Campus, Urrbrae, SA, Australia
| | - Jacqueline P Barsby
- Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
- School of Agriculture, Food and Wine, Faculty of Sciences, University of Adelaide, Waite Campus, Urrbrae, SA, Australia
| | - Lisa J Moran
- Monash Centre for Health Research and Implementation (MCHRI), Monash University, Clayton, VIC, Australia
- Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Jessica A Grieger
- Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
- Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Aya Mousa
- Monash Centre for Health Research and Implementation (MCHRI), Monash University, Clayton, VIC, Australia
| |
Collapse
|
2
|
Hung C, Chu W, Huang W, Lee P, Kuo W, Hou C, Yang C, Yang A, Wu W, Kuo M, Wu M, Chen W. Safety assessment of a proprietary fermented soybean solution, Symbiota®, as an ingredient for use in foods and dietary supplements: Non-clinical studies and a randomized trial. Food Sci Nutr 2024; 12:2346-2363. [PMID: 38628176 PMCID: PMC11016383 DOI: 10.1002/fsn3.3921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 04/20/2024] Open
Abstract
A safety evaluation was performed of Symbiota®, which is made by a proprietary anaerobic fermentation process of soybean with multistrains of probiotics and a yeast. The battery of genotoxicity studies showed that Symbiota® has no genotoxic effects. Safety and tolerability were further assessed by acute or repeated dose 28- and 90-day rodent studies, and no alterations in clinical observations, ophthalmological examination, blood chemistry, urinalysis, or hematology were observed between the control group and the different dosing groups (1.5, 5, and 15 mL/kg/day). There were no adverse effects on specific tissues or organs in terms of weight and histopathology. Importantly, the Symbiota® treatment did not perturb hormones and other endocrine-related endpoints. Of note, the No-Observed-Adverse-Effect-Level was determined to be 15 mL/kg/day in rats. Moreover, a randomized, double-blind, placebo-controlled clinical trial was recently conducted with healthy volunteers who consumed 8 mL/day of placebo or Symbiota® for 8 weeks. Only mild adverse events were reported in both groups, and the blood chemistry and blood cell profiles were also similar between the two groups. In summary, this study concluded that the oral consumption of Symbiota® at 8 mL/day by the general population does not pose any human health concerns.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Chia‐Chun Yang
- Microbio Co., LtdTaipeiTaiwan
- Microbio (Shanghai) Biotech CompanyShanghaiChina
| | | | - Wei‐Kai Wu
- Department of Medical ResearchNational Taiwan University HospitalTaipeiTaiwan
- Department of Internal MedicineNational Taiwan University HospitalTaipeiTaiwan
| | | | - Ming‐Shiang Wu
- Department of Internal MedicineNational Taiwan University HospitalTaipeiTaiwan
- Department of Internal MedicineNational Taiwan University College of MedicineTaipeiTaiwan
| | | |
Collapse
|
3
|
LaPointe S, Mehta A, Gaskins AJ. Diet and recreational drug use in relation to male reproductive health. Fertil Steril 2023; 120:1089-1097. [PMID: 37838140 DOI: 10.1016/j.fertnstert.2023.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/05/2023] [Accepted: 10/07/2023] [Indexed: 10/16/2023]
Abstract
Diet and lifestyle interventions present promising avenues for the improvement of male fertility. Our objective was to review and synthesize the existing observational and experimental studies among humans on the associations of diet and recreational drug use with semen quality and fertility outcomes. The available data on this topic are limited and, at times, conflicting. Nevertheless, on the basis of this review, dietary patterns that are composed of higher intakes of fruits, vegetables, whole grains, nuts, low-fat dairy, and seafood, as well as lower intakes of red and processed meats, sweets, and sugar-sweetened beverages were identified as having the strongest evidence for associations with better sperm quality. However, whether these dietary patterns translate into positive associations with clinical fertility endpoints such as assisted reproductive technology success rates or time-to-pregnancy among couples trying to conceive without medical assistance remains unclear. Male caffeine and alcohol intake, within low-to-moderate ranges of intake, do not appear to be detrimental to semen quality. Yet high-quality research on this topic, focused on clinical fertility endpoints, should continue given the conflicting evidence, particularly in populations undergoing infertility treatment with assisted reproductive technology. Recreational drug use, including marijuana, electronic cigarettes, and other illicit drugs, does not appear to be beneficial for male reproductive health and should be avoided or ceased. In conclusion, men should be encouraged to consume a healthy diet rich in fruits, vegetables, whole grains, nuts, low-fat dairy, and seafood, as well as lacking in red and processed meats, sweets, and sugar-sweetened beverages, and to avoid recreational drug use for improved male reproductive health.
Collapse
Affiliation(s)
- Sarah LaPointe
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, Georgia
| | - Akanksha Mehta
- Department of Urology, Emory University School of Medicine, Atlanta, Georgia
| | - Audrey J Gaskins
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, Georgia.
| |
Collapse
|
4
|
Olías R, Delgado-Andrade C, Padial M, Marín-Manzano MC, Clemente A. An Updated Review of Soy-Derived Beverages: Nutrition, Processing, and Bioactivity. Foods 2023; 12:2665. [PMID: 37509757 PMCID: PMC10379384 DOI: 10.3390/foods12142665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/06/2023] [Accepted: 07/09/2023] [Indexed: 07/30/2023] Open
Abstract
The global market for plant-based drinks is experiencing rapid growth driven by consumer demand for more sustainable diets, including vegetarian and vegan options. Soy beverages in particular are gaining popularity among individuals with lactose intolerance and milk protein allergies. They are considered an excellent source of high-quality protein, vitamin B, unsaturated fatty acids, and beneficial phytochemicals such as phytosterols, soy lecithins, and isoflavones. This review presents a comprehensive market survey of fifty-two soy beverages available in Spain and other European countries. The predominant category among those evaluated was calcium and vitamin-fortified drinks, accounting for 60% of the market. This reflects the need to address the nutritional gap compared to cow's milk and meet essential dietary requirements. The review covers the technological aspects of industrial soy milk production, including both traditional methods and innovative processing techniques. Additionally, it analyzes multiple studies and meta-analyses, presenting compelling evidence for the positive effects of soy beverages on various aspects of health. The review specifically examines the contributions of different components found in soy beverages, such as isoflavones, proteins, fiber, and oligosaccharides. Moreover, it explores controversial aspects of soy consumption, including its potential implications for growth, puberty, fertility, feminization, and the thyroid gland.
Collapse
Affiliation(s)
| | | | | | | | - Alfonso Clemente
- Department of Nutrition and Sustainable Animal Production, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, San Miguel 101, Armilla, E-18100 Granada, Spain
| |
Collapse
|
5
|
Mitsunami M, Mínguez-Alarcón L, Florio AA, Wang S, Attaman JA, Souter I, Hauser R, Chavarro JE. Intake of soy products and soy isoflavones in relation to ovarian reserve. Fertil Steril 2023; 119:1017-1029. [PMID: 36871859 PMCID: PMC10225319 DOI: 10.1016/j.fertnstert.2023.02.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 02/18/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023]
Abstract
OBJECTIVE To investigate the association between intake of soy food and isoflavone with ovarian reserve. Previous studies suggest on the relationship between soy intake and human fertility are inconsistent. Some clinical studies suggest that soy and phytoestrogens may not be deleterious to reproduction and may even be beneficial in couples undergoing infertility treatment. However, no studies have evaluated the relationship between soy or isoflavone intake with markers of ovarian reserve other than follicle-stimulating hormone (FSH). DESIGN Cross-sectional study. SETTING An academic fertility center. PATIENT(S) Patients presenting to an academic fertility center between 2007 and 2019 were invited to participate in the Environment and Reproductive Health Study. INTERVENTION(S) Six hundred and sixty seven participants reported their soy food intake and had an antral follicle count (AFC) assessment. Intake of 15 soy-based foods during the previous 3 months was obtained at baseline and intake of isoflavone was estimated. Participants were divided into 5 groups based on soy food and isoflavone intake considering those who did not consume soy as the reference group. MAIN OUTCOME MEASURE(S) Ovarian reserve was assessed using AFC as the primary outcome measure, with antimüllerian hormone (AMH) and FSH as secondary outcome measures. The AFC was measured on the third day of the menstrual cycle. Moreover, FSH and AMH levels were measured in blood samples obtained on the third day and the follicular phase of the menstrual cycle. To evaluate the association between soy intake and ovarian reserve, we used Poisson regression models for AFC and quantile regression models for AMH and day 3 FSH levels by adjusting for confounders. RESULT(S) Participants had a median age of 35.0 years. The median intake of soy was 0.09 servings/day and isoflavones was 1.78 mg/day. Moreover, AFC, AMH, and FSH were unrelated to soy intake in crude analyses. We found no association between soy food intake with AFC or day 3 FSH level in multivariable models. However, participants in the highest category of soy food intake had significantly low AMH levels (-1.16, 95% confidence interval: -1.92, -0.41). Soy intake had no association with AFC, AMH, or FSH in sensitivity analyses that included using different cutoff points of soy intake, excluding participants in the highest 2.5 percentile of intake, and additional statistical adjustment for dietary patterns. CONCLUSION(S) The results of this study are not consistent with a strong positive or inverse association of soy or isoflavone intakes within the observed range of intake, which substantially overlaps with that in the general population of the United States as well as the ovarian reserve among individuals presenting to fertility centers.
Collapse
Affiliation(s)
- Makiko Mitsunami
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Lidia Mínguez-Alarcón
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Andrea A Florio
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Siwen Wang
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Jill A Attaman
- Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Irene Souter
- Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Russ Hauser
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
| |
Collapse
|
6
|
Messina M, Duncan A, Messina V, Lynch H, Kiel J, Erdman JW. The health effects of soy: A reference guide for health professionals. Front Nutr 2022; 9:970364. [PMID: 36034914 PMCID: PMC9410752 DOI: 10.3389/fnut.2022.970364] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/25/2022] [Indexed: 11/22/2022] Open
Abstract
Soy is a hotly debated and widely discussed topic in the field of nutrition. However, health practitioners may be ill-equipped to counsel clients and patients about the use of soyfoods because of the enormous, and often contradictory, amount of research that has been published over the past 30 years. As interest in plant-based diets increases, there will be increased pressure for practitioners to gain a working knowledge of this area. The purpose of this review is to provide concise literature summaries (400-500 words) along with a short perspective on the current state of knowledge of a wide range of topics related to soy, from the cholesterol-lowering effects of soy protein to the impact of isoflavones on breast cancer risk. In addition to the literature summaries, general background information on soyfoods, soy protein, and isoflavones is provided. This analysis can serve as a tool for health professionals to be used when discussing soyfoods with their clients and patients.
Collapse
Affiliation(s)
- Mark Messina
- Soy Nutrition Institute Global, Washington, DC, United States
| | - Alison Duncan
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | | | - Heidi Lynch
- Kinesiology Department, Point Loma Nazarene University, San Diego, CA, United States
| | - Jessica Kiel
- Scientific and Clinical Affairs, Medifast Inc., Baltimore, MD, United States
| | - John W. Erdman
- Division of Nutritional Sciences and Beckman Institute, Department of Food Science and Human Nutrition, University of Illinois at Urbana/Champaign, Urbana, IL, United States
| |
Collapse
|
7
|
Assidi M. Infertility in Men: Advances towards a Comprehensive and Integrative Strategy for Precision Theranostics. Cells 2022; 11:cells11101711. [PMID: 35626747 PMCID: PMC9139678 DOI: 10.3390/cells11101711] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 02/05/2023] Open
Abstract
Male infertility is an increasing and serious medical concern, though the mechanism remains poorly understood. Impaired male reproductive function affects approximately half of infertile couples worldwide. Multiple factors related to the environment, genetics, age, and comorbidities have been associated with impaired sperm function. Present-day clinicians rely primarily on standard semen analysis to diagnose male reproductive potential and develop treatment strategies. To address sperm quality assessment bias and enhance analysis accuracy, the World Health Organization (WHO) has recommended standardized sperm testing; however, conventional diagnostic and therapeutic options for male infertility, including physical examination and semen standard analysis, remain ineffective in relieving the associated social burden. Instead, assisted reproductive techniques are becoming the primary therapeutic approach. In the post-genomic era, multiomics technologies that deeply interrogate the genome, transcriptome, proteome, and/or the epigenome, even at single-cell level, besides the breakthroughs in robotic surgery, stem cell therapy, and big data, offer promises towards solving semen quality deterioration and male factor infertility. This review highlights the complex etiology of male infertility, especially the roles of lifestyle and environmental factors, and discusses advanced technologies/methodologies used in characterizing its pathophysiology. A comprehensive combination of these innovative approaches in a global and multi-centric setting and fulfilling the suitable ethical consent could ensure optimal reproductive and developmental outcomes. These combinatorial approaches should allow for the development of diagnostic markers, molecular stratification classes, and personalized treatment strategies. Since lifestyle choices and environmental factors influence male fertility, their integration in any comprehensive approach is required for safe, proactive, cost-effective, and noninvasive precision male infertility theranostics that are affordable, accessible, and facilitate couples realizing their procreation dream.
Collapse
Affiliation(s)
- Mourad Assidi
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia; ; Tel.: +966-(012)-6402000 (ext. 69267)
- Medical Laboratory Department, Faculty of Applied Medical Sciences, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia
| |
Collapse
|
8
|
Salas-Huetos A, Mínguez-Alarcón L, Mitsunami M, Arvizu M, Ford JB, Souter I, Yeste M, Chavarro JE. Paternal adherence to healthy dietary patterns in relation to sperm parameters and outcomes of assisted reproductive technologies. Fertil Steril 2022; 117:298-312. [PMID: 34920872 PMCID: PMC8821200 DOI: 10.1016/j.fertnstert.2021.10.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/14/2021] [Accepted: 10/26/2021] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To investigate whether men's adherence to dietary patterns promoted for the prevention of cardiovascular disease is associated with semen parameters and couples' assisted reproductive technology (ART) outcomes. DESIGN Prospective cohort study. SETTING Fertility center at an academic medical center. PATIENT(S) A total of 245 men and their female partners who underwent 438 ART cycles between 2007 and 2020. INTERVENTION(S) Male pretreatment dietary intake was assessed with a 131-item food frequency questionnaire from which we calculated eight a priori defined scores: Trichopoulou Mediterranean, Alternate Mediterranean, Panagiotakos Mediterranean, Healthy Eating Index, Alternative Healthy Eating Index, American Heart Association, Dietary Approaches to Stop Hypertension, and Plant-based. MAIN OUTCOME MEASURE(S) The primary outcome was live births per treatment cycle. The secondary outcomes were fertilization, implantation, and clinical pregnancy and seminogram parameters. RESULT(S) There was an inverse association between greater adherence by men to the Panagiotakos Mediterranean diet and the American Heart Association dietary pattern and lower fertilization rate. However, there were no significant associations between men's adherence to any of the analyzed dietary patterns and the probabilities of implantation, clinical pregnancy, or live birth in multivariable-adjusted models. No significant differences in any of the semen parameters were found between participants of the lowest quartile and those of the highest quartile of the eight dietary patterns. CONCLUSION(S) These findings suggest that men's adherence to several a priori defined dietary scores with documented cardiovascular benefits is not related to major outcomes of infertility treatment with ART or semen quality.
Collapse
Affiliation(s)
- Albert Salas-Huetos
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Lidia Mínguez-Alarcón
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Makiko Mitsunami
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Mariel Arvizu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Jennifer B. Ford
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Irene Souter
- Massachusetts General Hospital Fertility Center and Harvard Medical School, Boston, MA, USA
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, Girona, Spain.,Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, Girona, Spain
| | - Jorge E. Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Corresponding author: Jorge E. Chavarro, Department of Nutrition and Department of Epidemiology, Harvard T.H. Chan School of Public Health, 655 Huntington Avenue, Boston, MA, 02115, USA.
| | | |
Collapse
|
9
|
Mitsunami M, Salas-Huetos A, Mínguez-Alarcón L, Attaman JA, Ford JB, Kathrins M, Souter I, Chavarro JE. A dietary score representing the overall relation of men's diet with semen quality in relation to outcomes of infertility treatment with assisted reproduction. F S Rep 2021; 2:396-404. [PMID: 34934979 PMCID: PMC8655432 DOI: 10.1016/j.xfre.2021.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/26/2022] Open
Abstract
Objective To examine the impact of men's diet on outcomes of infertility treatment with assisted reproductive technology (ART) using an empirical score representing the relation of diet with semen quality. Design Prospective cohort study. Setting Fertility center at an academic medical center. Patients We included 296 men (688 semen samples) to identify an empirical dietary pattern and 231 couples (406 ART cycles) to investigate the association of this diet pattern with ART outcomes. Interventions Men's diet was assessed at baseline using a validated questionnaire. An empirical dietary pattern reflecting the overall relation of diet with semen quality was identified using reduced rank regression. Main Outcome Measures The primary outcome was live birth per treatment cycle. The secondary outcomes were fertilization, implantation, and clinical pregnancy. Results Men had a median baseline age and body mass index of 36.8 years and 26.9 kg/m2, respectively. Although the empirical diet pattern was significantly associated with all semen parameters, the empirical diet score was not related to any clinical outcome of infertility treatment after ART. The adjusted probabilities of relevant clinical outcomes in the lowest and highest quartiles of the empirical score were 0.62 (0.50-0.73) and 0.55 (0.45-0.66) for implantation, 0.57 (0.46-0.69) and 0.50 (0.40-0.61) for clinical pregnancy, and 0.49 (0.37-0.62) and 0.36 (0.25-0.48) for live birth. Analyses excluding couples with a diagnosis of male factor infertility and, separately, excluding intracytoplasmic sperm injection cycles yielded similar results. Conclusions A dietary score representing the overall association of diet with semen quality parameters was not associated with ART outcomes.
Collapse
Affiliation(s)
- Makiko Mitsunami
- Master of Medical Sciences in Clinical Investigation Program, Harvard Medical School.,Department of Nutrition, Harvard T.H. Chan School of Public Health
| | | | - Lidia Mínguez-Alarcón
- Department of Environmental Health, Harvard T.H. Chan School of Public Health.,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School
| | - Jill A Attaman
- Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School
| | - Jennifer B Ford
- Department of Environmental Health, Harvard T.H. Chan School of Public Health
| | - Martin Kathrins
- Division of Urology, Department of Surgery, Brigham and Women's Hospital and Harvard Medical School
| | - Irene Souter
- Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health.,Department of Epidemiology, Harvard T.H. Chan School of Public Health.,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School
| |
Collapse
|
10
|
Nassan FL, Priskorn L, Salas-Huetos A, Halldorsson TI, Jensen TK, Jørgensen N, Chavarro JE. Association between intake of soft drinks and testicular function in young men. Hum Reprod 2021; 36:3036-3048. [PMID: 34585250 DOI: 10.1093/humrep/deab179] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 06/24/2021] [Indexed: 01/05/2023] Open
Abstract
STUDY QUESTION Is intake of sugar-sweetened beverages (SSB) or artificially sweetened beverages (ASB) associated with testicular function in young men? SUMMARY ANSWER Among young men unaware of their semen quality and reproductive hormone levels, intake of SSBs was associated with lower sperm concentration, lower total sperm count, and a lower ratio of serum inhibin-B/FSH. WHAT IS KNOWN ALREADY SSBs may adversely impact testicular function, but results are not consistent across studies. Moreover, the associations of ASB, energy-drinks or fruit juices with testicular function are unclear. STUDY DESIGN, SIZE, DURATION Young healthy men and unselected for fertility status men enrolled in a cross-sectional study between 2008 and 2017. PARTICIPANTS/MATERIALS, SETTING, METHODS A total of 2935 young (median age: 19 years) men enrolled in the study. Intake of SSBs, ASBs, fruit juices, and energy-drinks was assessed with a validated food frequency questionnaire. Testicular function was assessed through conventional semen quality parameters (semen volume, sperm concentration, total count, motility and morphology), testicular volume assessed with ultrasound, and serum reproductive hormone concentrations (total testosterone, free testosterone, E2, inhibin-B, LH, FSH, sex hormone-binding globulin) were measured. MAIN RESULTS AND THE ROLE OF CHANCE In multivariable-adjusted analyses, men in the highest category of SSB intake (median: 1.1 servings (∼220 ml)/day) had a 13.2 million/ml lower median sperm concentration (95% CI: -21.0, -5.5) than non-consumers. A similar pattern was observed with total sperm count (-28 million (95% CI: -48, -9)), serum inhibin-B (-12 pg/ml (95% CI: -21, -4)), and inhibin-B/FSH ratio (-9 (95% CI: -18, 0)). The adjusted median difference in sperm concentration and inhibin-B associated with increasing SSB intake by 1 serving (∼200ml)/day at the expense of water was -3.4 million sperm/ml (95% CI: -5.8, -1.0) and -7 pg/ml (95% CI: -11, -3), respectively. LIMITATIONS, REASONS FOR CAUTION Inferring causality is limited owing to the cross-sectional design. We adjusted for a number of potential confounders but cannot exclude that unmeasured lifestyle and behavior associated with soft drink intake is associated with testicular function in these young men. WIDER IMPLICATIONS OF THE FINDINGS In the largest study to date, intake of SSBs was associated with lower sperm concentration, total sperm count, and serum inhibin-B/FSH ratio, consistent with a direct suppressive effect of SSB intake on testicular function among otherwise healthy men, potentially affecting fertility. However, the observed association between higher SSB intake and lower semen quality does not necessarily imply a decrease in fertility. STUDY FUNDING/COMPETING INTEREST(S) Supported by research from the Danish Council for Strategic Research (2101-08-0058), Independent Research Fund Denmark (8020-00218B), European Union (212844), the Kirsten and Freddy Johansen's Foundation (95-103-72087), the Research Fund of the Capital Region of Denmark (A6176), and the NIH (P30DK046200). The authors report no conflict of interest. TRIAL REGISTRATION NUMBER N/A.
Collapse
Affiliation(s)
- F L Nassan
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - L Priskorn
- Department of Growth and Reproduction, and International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - A Salas-Huetos
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - T I Halldorsson
- Department of Epidemiology Research, Centre for Foetal Programming, Statens Serum Institut, Copenhagen, Denmark.,Faculty of Food Science and Nutrition, School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - T K Jensen
- Department of Growth and Reproduction, and International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), University of Copenhagen, Rigshospitalet, Copenhagen, Denmark.,Department of Environmental Medicine, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - N Jørgensen
- Department of Growth and Reproduction, and International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - J E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Channing Division of Network Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
| |
Collapse
|
11
|
Mitsunami M, Salas-Huetos A, Mínguez-Alarcón L, Attaman JA, Ford JB, Kathrins M, Souter I, Chavarro JE. Men's dietary patterns in relation to infertility treatment outcomes among couples undergoing in vitro fertilization. J Assist Reprod Genet 2021; 38:2307-2318. [PMID: 34173913 PMCID: PMC8490600 DOI: 10.1007/s10815-021-02251-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/27/2021] [Indexed: 11/26/2022] Open
Abstract
PURPOSE(S) To evaluate the relationship of men's dietary patterns with outcomes of in vitro fertilization (IVF). METHODS This is a prospective cohort study including 231 couples with 407 IVF cycles, presented at an academic fertility center from April 2007 to April 2018. We assessed diet with a validated food frequency questionnaire and identified Dietary Pattern 1 and Dietary Pattern 2 using principal component analysis. We evaluated adjusted probability of IVF outcomes across the quartiles of the adherence to two dietary patterns by generalized linear mixed models. RESULTS Men had a median age of 36.8 years and BMI of 26.9 kg/m2. Women's median age and BMI were 35.0 years and 23.1 kg/m2, respectively. Adherence to Dietary Pattern 1 (rPearson=0.44) and Dietary Pattern 2 (rPearson=0.54) was positively correlated within couples. Adherence to Dietary Pattern 1 was positively associated with sperm concentration. A 1-unit increase in this pattern was associated with a 13.33 (0.71-25.96) million/mL higher sperm concentration. However, neither Dietary Pattern 1 nor Dietary Pattern 2 was associated with fertilization, implantation, clinical pregnancy, or live birth probabilities. CONCLUSIONS Data-derived dietary patterns were associated with semen quality but unrelated to the probability of successful IVF outcomes.
Collapse
Affiliation(s)
| | - Albert Salas-Huetos
- Department of Nutrition, Harvard T.H. Chan School of Public Health, 655 Huntington Avenue, Boston, MA, 02115, USA
| | - Lidia Mínguez-Alarcón
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Jill A Attaman
- Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, USA
| | - Jennifer B Ford
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA
| | - Martin Kathrins
- Division of Urology, Department of Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Irene Souter
- Fertility Center, Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, USA
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, 655 Huntington Avenue, Boston, MA, 02115, USA.
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, USA.
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA.
| |
Collapse
|
12
|
Aoun A, Khoury VE, Malakieh R. Can Nutrition Help in the Treatment of Infertility? Prev Nutr Food Sci 2021; 26:109-120. [PMID: 34316476 PMCID: PMC8276703 DOI: 10.3746/pnf.2021.26.2.109] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/25/2021] [Accepted: 03/02/2021] [Indexed: 11/06/2022] Open
Abstract
Infertility is defined as the inability to conceive after 12 months of unprotected intercourse or six months for women aged 35 years or older. The physical, emotional, psychological, and financial statuses of infertile couples are tremendously affected especially after undergoing diagnostic and/or curative treatments. Human fertility is influenced by multiple factors including female or male, and modifiable or non-modifiable factors. There is growing evidence that nutri-tion may play an important role in adjusting fertility-related outcomes in both men and women. The objective of our study was to summarize the latest data on nutritional factors (specific food groups, nutrients, and nutritional supplements) that have an impact on female or male sexual and reproductive function. PubMed and Google Scholar platforms were used to collect appropriate articles for the review using several combinations of keywords (infertility, diet, dietary supplements, antioxidants, and beverages). Adherence to a healthy dietary pattern favoring fish, poultry, whole grains, fruits, vegetables, and healthy fats, was related to better fertility in both genders. Despite the multifactorial etiology of sexual infertility, nutrition may affect the sexual/reproductive function in both women and men.
Collapse
Affiliation(s)
- Antoine Aoun
- Faculty of Nursing and Health Sciences, Notre Dame University-Louaize, Zouk Mosbeh 72, Lebanon
| | - Veronique El Khoury
- Faculty of Nursing and Health Sciences, Notre Dame University-Louaize, Zouk Mosbeh 72, Lebanon
| | - Roubina Malakieh
- Faculty of Nursing and Health Sciences, Notre Dame University-Louaize, Zouk Mosbeh 72, Lebanon
| |
Collapse
|
13
|
Messina M, Mejia SB, Cassidy A, Duncan A, Kurzer M, Nagato C, Ronis M, Rowland I, Sievenpiper J, Barnes S. Neither soyfoods nor isoflavones warrant classification as endocrine disruptors: a technical review of the observational and clinical data. Crit Rev Food Sci Nutr 2021; 62:5824-5885. [PMID: 33775173 DOI: 10.1080/10408398.2021.1895054] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Soybeans are a rich source of isoflavones, which are classified as phytoestrogens. Despite numerous proposed benefits, isoflavones are often classified as endocrine disruptors, based primarily on animal studies. However, there are ample human data regarding the health effects of isoflavones. We conducted a technical review, systematically searching Medline, EMBASE, and the Cochrane Library (from inception through January 2021). We included clinical studies, observational studies, and systematic reviews and meta-analyses (SRMA) that examined the relationship between soy and/or isoflavone intake and endocrine-related endpoints. 417 reports (229 observational studies, 157 clinical studies and 32 SRMAs) met our eligibility criteria. The available evidence indicates that isoflavone intake does not adversely affect thyroid function. Adverse effects are also not seen on breast or endometrial tissue or estrogen levels in women, or testosterone or estrogen levels, or sperm or semen parameters in men. Although menstrual cycle length may be slightly increased, ovulation is not prevented. Limited insight could be gained about possible impacts of in utero isoflavone exposure, but the existing data are reassuring. Adverse effects of isoflavone intake were not identified in children, but limited research has been conducted. After extensive review, the evidence does not support classifying isoflavones as endocrine disruptors.
Collapse
Affiliation(s)
- Mark Messina
- Department of Nutrition, Loma Linda University, Loma Linda, California, USA
| | - Sonia Blanco Mejia
- Department of Nutritional Sciences, University of Toronto, Toronto, Canada
| | - Aedin Cassidy
- Nutrition and Preventive Medicine, Queen's University, Belfast, Northern Ireland, UK
| | - Alison Duncan
- College of Biological Sciences, University of Guelph, Guelph, Canada
| | - Mindy Kurzer
- Department of Food Science and Nutrition, University of Minnesota, Minneapolis, Minnesota, USA
| | - Chisato Nagato
- Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Martin Ronis
- Health Sciences Center, Louisiana State University Health Sciences Center, Baton Rouge, New Orleans, USA
| | - Ian Rowland
- Human Nutrition, University of Reading, Reading, England, UK
| | | | - Stephen Barnes
- Department of Pharmacology and Toxicology, University of Alabama, Alabama, USA
| |
Collapse
|
14
|
Xu Y, Le Sayec M, Roberts C, Hein S, Rodriguez-Mateos A, Gibson R. Dietary Assessment Methods to Estimate (Poly)phenol Intake in Epidemiological Studies: A Systematic Review. Adv Nutr 2021; 12:1781-1801. [PMID: 33684195 PMCID: PMC8483972 DOI: 10.1093/advances/nmab017] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/06/2021] [Accepted: 01/29/2021] [Indexed: 11/25/2022] Open
Abstract
Nutritional epidemiological studies have frequently reported associations between higher (poly)phenol intake and a decrease in the risk or incidence of noncommunicable diseases. However, the assessment methods that have been used to quantify the intakes of these compounds in large-population samples are highly variable. This systematic review aims to characterize the methods used to assess dietary (poly)phenol intake in observational studies, report the validation status of the methods, and give recommendations on method selection and data reporting. Three databases were searched for publications that have used dietary assessment methods to measure (poly)phenol intake and 549 eligible full texts were identified. Food-frequency questionnaires were found to be the most commonly used tool to assess dietary (poly)phenol intake (73%). Published data from peer-reviewed journals were the major source of (poly)phenol content data (25%). An increasing number of studies used open-access databases such as Phenol-Explorer and USDA databases on flavonoid content since their inception, which accounted for 11% and 23% of the data sources, respectively. Only 16% of the studies reported a method that had been validated for measuring the target (poly)phenols. For future research we recommend: 1) selecting a validated dietary assessment tool according to the target compounds and target period of measurement; 2) applying and combining comprehensive (poly)phenol content databases such as USDA and Phenol-Explorer; 3) detailing the methods used to assess (poly)phenol intake, including dietary assessment method, (poly)phenol content data source; 4) follow the Strengthening the Reporting of Observational Studies in Epidemiology-Nutritional Epidemiology (STROBE-nut) framework; and 5) complementing dietary intake assessment based on questionnaires with measurement of (poly)phenols in biofluids using appropriate and validated analytical methods.
Collapse
Affiliation(s)
- Yifan Xu
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Melanie Le Sayec
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Caroline Roberts
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Sabine Hein
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom,School of Psychology and Clinical Language Sciences, University of Reading, Reading, United Kingdom
| | | | | |
Collapse
|
15
|
Green MP, Harvey AJ, Finger BJ, Tarulli GA. Endocrine disrupting chemicals: Impacts on human fertility and fecundity during the peri-conception period. ENVIRONMENTAL RESEARCH 2021; 194:110694. [PMID: 33385395 DOI: 10.1016/j.envres.2020.110694] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/24/2020] [Accepted: 12/25/2020] [Indexed: 05/08/2023]
Abstract
It is becoming increasingly difficult to avoid exposure to man-made endocrine disrupting chemicals (EDCs) and environmental toxicants. This escalating yet constant exposure is postulated to partially explain the concurrent decline in human fertility that has occurred over the last 50 years. Controversy however remains as to whether associations exist, with conflicting findings commonly reported for all major EDC classes. The primary aim of this extensive work was to identify and review strong peer-reviewed evidence regarding the effects of environmentally-relevant EDC concentrations on adult male and female fertility during the critical periconception period on reproductive hormone concentrations, gamete and embryo characteristics, as well as the time to pregnancy in the general population. Secondly, to ascertain whether individuals or couples diagnosed as sub-fertile exhibit higher EDC or toxicant concentrations. Lastly, to highlight where little or no data exists that prevents strong associations being identified. From the greater than 1480 known EDCs, substantial evidence supports a negative association between exposure to phthalates, PCBs, PBDEs, pyrethroids, organochloride pesticides and male fertility and fecundity. Only moderate evidence exists for a negative association between BPA, PCBs, organochloride pesticides and female fertility and fecundity. Overall fewer studies were reported in women than men, with knowledge gaps generally evident for both sexes for all the major EDC classes, as well as a paucity of female fertility studies following exposure to parabens, triclosans, dioxins, PFAS, organophosphates and pyrethroids. Generally, sub-fertile individuals or couples exhibit higher EDC concentrations, endorsing a positive association between EDC exposure and sub-fertility. This review also discusses confounding and limiting factors that hamper our understanding of EDC exposures on fertility and fecundity. Finally, it highlights future research areas, as well as government, industry and social awareness strategies required to mitigate the negative effects of EDC and environmental toxicant exposure on human fertility and fecundity.
Collapse
Affiliation(s)
- Mark P Green
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia.
| | - Alexandra J Harvey
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia
| | - Bethany J Finger
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia
| | - Gerard A Tarulli
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia
| |
Collapse
|
16
|
Povey AC, Clyma JA, McNamee R, Moore HD, Baillie H, Pacey AA, Cade JE, Cherry NM. Phytoestrogen intake and other dietary risk factors for low motile sperm count and poor sperm morphology. Andrology 2020; 8:1805-1814. [PMID: 32649041 DOI: 10.1111/andr.12858] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/12/2020] [Accepted: 06/29/2020] [Indexed: 01/03/2023]
Abstract
BACKGROUND Few potentially modifiable risk factors of male infertility have been identified, and while different diets and food groups have been associated with male infertility, evidence linking dietary factors including phytoestrogens and semen quality is limited and contradictory. OBJECTIVES To study the associations between phytoestrogen intake and other dietary factors and semen quality. MATERIALS AND METHODS A case-referent study was undertaken of the male partners, of couples attempting conception with unprotected intercourse for 12 months or more without success, recruited from 14 UK assisted reproduction clinics. A total of 1907 participants completed occupational, lifestyle and dietary questionnaires before semen quality (concentration, motility and morphology) were assessed. Food intake was estimated by a 65-item food frequency questionnaire (FFQ) covering the 12 months prior to recruitment. Analyses of dietary risk factors for low motile sperm concentration (MSC: <4.8 × 106 /mL) and poor sperm morphology (PM: <4% normal morphology) used unconditional logistic regression, accounting for clustering of subjects within the clinics, first without, and then with, adjustment for confounders associated with that outcome. RESULTS High consumption of daidzein (≥13.74 μg/d), a phytoestrogen found in soy products, was a protective factor for MSC with an odds ratio (95%CI) of 0.58 (0.42-0.82) after adjustment for clustering and potential confounding. Dietary risk factors for PM after similar adjustment showed that drinking whole milk (OR 0.67, 95%CI 0.47-0.96) and eating red meat were protective with an OR 0.67 (0.46-0.99) for eating red meat >3 times/wk. DISCUSSION In this case-referent study of men attending an infertility clinic for fertility diagnosis, we have identified that low MSC is inversely associated with daidzein intake. In contrast, daidzein intake was not associated with PM but eating red milk and drinking whole milk were protective. CONCLUSIONS Dietary factors associated with semen quality were identified, suggesting that male fertility might be improved by dietary changes.
Collapse
Affiliation(s)
- Andy C Povey
- Epidemiology and Public Health Group, Faculty of Biology, Medicine and Health, Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Julie-Ann Clyma
- Epidemiology and Public Health Group, Faculty of Biology, Medicine and Health, Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Roseanne McNamee
- Centre for Biostatistics, Faculty of Biology, Medicine and Health, Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Harry D Moore
- Department of Oncology and Metabolism, School of Medicine and Biomedical Sciences, University of Sheffield, Sheffield, UK
| | - Helen Baillie
- Jessop Fertility, The Jessop Wing, Sheffield Teaching Hospitals, Tree Root Walk, Sheffield, UK
| | - Allan A Pacey
- Department of Oncology and Metabolism, School of Medicine and Biomedical Sciences, University of Sheffield, Sheffield, UK
| | - Janet E Cade
- Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK
| | - Nicola M Cherry
- Division of Preventive Medicine, University of Alberta, Edmonton, AB, Canada
| | | |
Collapse
|
17
|
Antifreeze protein from Anatolia polita (ApAFP914) improved outcome of vitrified in vitro sheep embryos. Cryobiology 2020; 93:109-114. [PMID: 32032586 DOI: 10.1016/j.cryobiol.2020.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/02/2020] [Accepted: 02/03/2020] [Indexed: 01/25/2023]
Abstract
Embryo cryopreservation is an important tool to preserve endangered species. As a cryoprotectant for mouse oocytes, antifreeze protein from Anatolica polita (ApAFP914) has demonstrated utility. In the present study, the effects of controlled slow freezing and vitrification methods on the survival rate of sheep oocytes fertilized in vitro after freezing-thawing were compared. Different ApAFP914 concentrations were added to the vitrification liquid for exploring the effect of antifreeze protein on the warmed embryos. The results showed that the survival and hatching rates of in vitro derived embryos were significantly higher than that of the slow freezing method. Furthermore, among the cryopreserved embryos at different developmental stages, the survival and hatching rates of the expanded blastocyst were significantly higher than those of the blastocysts, early blastocysts and morula. The survival and the hatching rates of the fast-growing embryos were both significantly higher than that of the slow-growing embryos. Additionally, treatment of ApAFP914 (5-30 μg/mL) did not increase the freezing efficiency of the 6-6.5 d embryos. However, addition of 10 μg/mL of ApAFP914 significantly increased the hatching rate of slow-growing embryos. In conclusion, our study suggests that the vitrification is better than the slow freezing method for the conservation of in vitro sheep embryos, and supplementation of ApAFP914 (10 μg/mL) significantly increased the hatching rate of slow-growing embryos after cryopreservation.
Collapse
|
18
|
Yuan G, Liu Y, Liu G, Wei L, Wen Y, Huang S, Guo Y, Zou F, Cheng J. Associations between semen phytoestrogens concentrations and semen quality in Chinese men. ENVIRONMENT INTERNATIONAL 2019; 129:136-144. [PMID: 31128434 DOI: 10.1016/j.envint.2019.04.076] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 04/15/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Phytoestrogens (PEs) are naturally estrogen-like chemicals, and increasing evidences have indicated their endocrine disruption effects on male reproductivity, but the conclusions from previous epidemiological studies were controversial. OBJECTIVE To examine the associations between nine phytoestrogens in semen and semen quality in a Chinese population. METHODS In this cross-sectional study, a total of 1319 reproductive-aged men were recruited from Shenzhen, China. Semen phytoestrogens were measured by ultra-performance liquid chromatography and tandem mass spectrometry. Semen quality was assessed by sperm concentration, sperm count, progressive motility, total motility, volume, and the sperm motion parameters. Both multivariate linear regression and logistic regression models were conducted to evaluate the associations between semen phytoestrogens and semen quality with adjustment for confounders. RESULTS In logistic regression models, we found significant associations between semen secoisolariciresinol (SEC) and lower sperm concentrations (odd ratios (OR): 2.38; 95% confidence interval, 95% CI: 1.47, 3.93), sperm counts (OR: 2.27; 95% CI: 1.34, 3.94), and total motility (OR: 1.55; 95% CI: 1.08, 2.24). Negative associations were also observed for semen genistein (GEN) with sperm counts (OR: 2.28; 95% CI: 1.29, 4.14; p for trend = 0.04) and sperm concentrations (OR: 1.98; 95% CI: 1.21, 3.03; p for trend = 0.07). Semen naringenin (NAR) were found to be positively associated with progressive motility (OR: 0.57; 95% CI: 0.38, 0.83) and total motility (OR: 0.57; 95% CI: 0.40, 0.81). Results from multivariate linear regression models were similar to those from logistic regression models for semen SEC, GEN, and NAR. CONCLUSIONS We suggested that semen levels of phytoestrogens may be associated with semen quality in men. Further investigations are warranted to confirm the findings in prospective studies and to explore the underlying mechanism.
Collapse
Affiliation(s)
- Guanxiang Yuan
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China; Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China
| | - Yu Liu
- Shenzhen People's Hospital, Second Clinical Medical College of Jinan University, Shenzhen, China
| | - Guihua Liu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Lan Wei
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Ying Wen
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Suli Huang
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Yinsheng Guo
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Fei Zou
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China.
| | - Jinquan Cheng
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China.
| |
Collapse
|
19
|
Nassan FL, Chavarro JE, Tanrikut C. Diet and men's fertility: does diet affect sperm quality? Fertil Steril 2019; 110:570-577. [PMID: 30196939 DOI: 10.1016/j.fertnstert.2018.05.025] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 05/23/2018] [Indexed: 12/27/2022]
Abstract
Male contribution to a couple's fecundity is important, and identifying the dietary factors that can influence male fertility potential is of high importance. Despite this importance, there are currently no clear clinical guidelines for male patients seeking fertility treatment. In this review, we present the most up-to-date evidence about diet and male fertility in humans. We focus on the dietary factors necessary for production of healthy functioning sperm with high fertility potential. Based on this review, men may be encouraged to use antioxidant supplements and to follow dietary patterns favoring the consumption of seafood, poultry, nuts, whole grains, fruits, and vegetables. Evidence is strongest for recommending the use of antioxidant supplements to men in couples undergoing infertility treatment-although the specific antioxidants and doses remain unclear-and increasing consumption of omega-3 fatty acids from fish and nuts.
Collapse
Affiliation(s)
- Feiby L Nassan
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; Channing Division of Network Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts
| | - Cigdem Tanrikut
- Department of Urology, Shady Grove Fertility, Baltimore, Maryland.
| |
Collapse
|
20
|
Danielewicz A, Przybyłowicz KE, Przybyłowicz M. Dietary Patterns and Poor Semen Quality Risk in Men: A Cross-Sectional Study. Nutrients 2018; 10:nu10091162. [PMID: 30149588 PMCID: PMC6165100 DOI: 10.3390/nu10091162] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 08/17/2018] [Accepted: 08/23/2018] [Indexed: 11/16/2022] Open
Abstract
The etiology of diminished sperm quality in about 30% of male infertility cases generally remains unexplained. Some studies have suggested that specific nutritional factors can affect semen quality. The aim of this study was to evaluate an association between dietary patterns (DPs) and the risk of abnormal semen quality parameters in men. This cross-sectional study was carried out in 114 men aged 20⁻55 years from Poland. Semen parameters were assessed via computer-aided semen. Diet was assessed by a food frequency questionnaire (FFQ). DPs were derived using Principal Component Analysis (PCA). Two DPs were derived: Pro-healthy and Western. After adjusting for potential confounders, the risk of abnormal progressive motility was significantly higher in the middle (OR: 2.89, 95% CI: 1.03⁻8.09) and upper (OR: 7.78, 95% CI: 1.52⁻15.06) tertiles of the Western DP. A trend for increased risk of the abnormal total count, progressive motility, and morphology (P-trend < 0.050) was found in Western DP. To conclude, the Western DP may increase the risk of abnormal semen parameters, whereas no association was found in the case of Pro-healthy DP. These findings stand in contrast to an increasing number of research findings indicating a positive relation between intake of healthy foods or diet and semen quality parameters. The results highlight the need to study whether modifications in diet and lifestyle factors improve semen quality.
Collapse
Affiliation(s)
- Anna Danielewicz
- Department of Human Nutrition, University of Warmia and Mazury in Olsztyn, ul. Słoneczna 45F, 10-718 Olsztyn, Poland.
| | | | - Mariusz Przybyłowicz
- Center of Gynecology, Endocrinology and Reproductive Medicine Artemida in Olsztyn, Jagiellońska 78, 10-229 Olsztyn, Poland.
| |
Collapse
|
21
|
Gaskins AJ, Chavarro JE. Diet and fertility: a review. Am J Obstet Gynecol 2018; 218:379-389. [PMID: 28844822 PMCID: PMC5826784 DOI: 10.1016/j.ajog.2017.08.010] [Citation(s) in RCA: 171] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 08/07/2017] [Accepted: 08/16/2017] [Indexed: 01/17/2023]
Abstract
The literature on the relationship between diet and human fertility has greatly expanded over the last decade, resulting in the identification of a few clear patterns. Intake of supplemental folic acid, particularly at doses higher than those recommended for the prevention of neural tube defects, has been consistently related to lower frequency of infertility, lower risk of pregnancy loss, and greater success in infertility treatment. On the other hand and despite promising evidence from animal models, vitamin D does not appear to exert an important role in human fertility in the absence of deficiency. Antioxidant supplementation does not appear to offer any benefits to women undergoing infertility treatment, but it appears to be beneficial when it is the male partner who is supplemented. However, the available evidence does not allow discerning which specific antioxidants, or at which doses, are responsible for this benefit. Long-chain omega-3 fatty acids appear to improve female fertility, although it remains unclear to what extent contamination of shared food sources, such as fish with high levels of environmental toxicants, can dampen this benefit. Lastly, adherence to healthy diets favoring seafood, poultry, whole grains, fruits, and vegetables are related to better fertility in women and better semen quality in men. The cumulative evidence has also piled against popular hypotheses. Dairy and soy, once proposed as reproductive toxicants, have not been consistently related to poor fertility. In fact, soy and soy supplements appear to exert a beneficial effect among women undergoing infertility treatment. Similarly, because data from large, high-quality studies continue to accumulate, the evidence of a potentially deleterious effect of moderate alcohol and caffeine intake on the ability to become pregnant seems less solid than it once did. While a complete picture of the role of nutrition on fertility is far from complete, much progress has been made. The most salient gaps in the current evidence include jointly considering female and male diets and testing the most consistent findings in randomized trials.
Collapse
Affiliation(s)
- Audrey J Gaskins
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA; Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.
| |
Collapse
|
22
|
Ricci E, Al-Beitawi S, Cipriani S, Alteri A, Chiaffarino F, Candiani M, Gerli S, Viganó P, Parazzini F. Dietary habits and semen parameters: a systematic narrative review. Andrology 2017; 6:104-116. [PMID: 29266782 DOI: 10.1111/andr.12452] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/03/2017] [Accepted: 11/07/2017] [Indexed: 01/10/2023]
Abstract
Semen quality and male fertility are declining worldwide. As it was observed that physiologic and pathologic processes of spermatogenesis can be influenced by diet, the relation between dietary habits and semen parameters has been the focus of much interest. To review the human observational studies on this issue, we performed a systematic literature search, up to November 2016 (MEDLINE and EMBASE). We included all observational full-text papers reporting the relation between dietary habits and semen parameters. Article selection was carried out in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Twenty-three observational studies were included. Overall, 8477 healthy men and 1204 men presenting at Fertility Clinics were included in the selected studies. Even if some inconsistencies are present, possibly due to the different effect of nutrients in fertile and infertile men, results support the hypothesis that diets including fruit and vegetables, for their contents in vitamins, and fish or low-fat dairy products as the main source of proteins, are associated with better semen quality. Recommendations may be confidently provided because of the many beneficial effects of a healthy diet, although further studies are needed to clarify the currently inconsistent findings and to shed light on the underlying mechanisms.
Collapse
Affiliation(s)
- E Ricci
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - S Al-Beitawi
- Reproductive Sciences Laboratory, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - S Cipriani
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - A Alteri
- Reproductive Sciences Laboratory, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - F Chiaffarino
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - M Candiani
- Obstetrics and Gynecology Unit, San Raffaele Scientific Institute and Vita-Salute University, Milano, Italy
| | - S Gerli
- Department of Obstetrics and Gynecology, University of Perugia, Perugia, Italy
| | - P Viganó
- Reproductive Sciences Laboratory, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - F Parazzini
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Dipartimento di Scienze Cliniche e di Comunità, Università di Milano, Milano, Italy
| |
Collapse
|
23
|
Messerlian C, Gaskins AJ. Epidemiologic Approaches for Studying Assisted Reproductive Technologies: Design, Methods, Analysis and Interpretation. CURR EPIDEMIOL REP 2017; 4:124-132. [PMID: 29034142 DOI: 10.1007/s40471-017-0105-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
PURPOSE While considerable progress has been made since the advent of assisted reproductive technology (ART), the field remains a complex and challenging one for clinicians and researchers alike. This review discusses some of the most salient issues pertaining to the study of ART and whenever possible suggestions on how to address them. RECENT FINDINGS More than 5 million babies have been born through ART to date, representing up to 4% of all births worldwide. While technologies continue to evolve and demand for treatment grows, it is more important than ever to conduct rigorous and timely research to help guide clinical practice that is safe and effective, and that minimizes potential short- and long-term adverse outcomes to mother and child. SUMMARY ART research will require exceedingly more sophisticated research methods, designs, and analyses that are rooted in a reproductive epidemiological framework in order to improve future research and ultimately promote better outcomes for all subfertile couples and their children.
Collapse
Affiliation(s)
- Carmen Messerlian
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Audrey J Gaskins
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA.,Channing Division of Network Medicine, Brigham and Women's Hospital & Harvard Medical School, Boston, MA
| |
Collapse
|
24
|
Messina M. Soy and Health Update: Evaluation of the Clinical and Epidemiologic Literature. Nutrients 2016; 8:E754. [PMID: 27886135 PMCID: PMC5188409 DOI: 10.3390/nu8120754] [Citation(s) in RCA: 217] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 01/10/2023] Open
Abstract
Soyfoods have long been recognized as sources of high-quality protein and healthful fat, but over the past 25 years these foods have been rigorously investigated for their role in chronic disease prevention and treatment. There is evidence, for example, that they reduce risk of coronary heart disease and breast and prostate cancer. In addition, soy alleviates hot flashes and may favorably affect renal function, alleviate depressive symptoms and improve skin health. Much of the focus on soyfoods is because they are uniquely-rich sources of isoflavones. Isoflavones are classified as both phytoestrogens and selective estrogen receptor modulators. Despite the many proposed benefits, the presence of isoflavones has led to concerns that soy may exert untoward effects in some individuals. However, these concerns are based primarily on animal studies, whereas the human research supports the safety and benefits of soyfoods. In support of safety is the recent conclusion of the European Food Safety Authority that isoflavones do not adversely affect the breast, thyroid or uterus of postmenopausal women. This review covers each of the major research areas involving soy focusing primarily on the clinical and epidemiologic research. Background information on Asian soy intake, isoflavones, and nutrient content is also provided.
Collapse
Affiliation(s)
- Mark Messina
- Nutrition Matters, Inc., 26 Spadina Parkway, Pittsfield, MA 01201, USA.
| |
Collapse
|
25
|
Xia W, Chiu YH, Afeiche MC, Williams PL, Ford JB, Tanrikut C, Souter I, Hauser R, Chavarro JE. Impact of men's dairy intake on assisted reproductive technology outcomes among couples attending a fertility clinic. Andrology 2016; 4:277-83. [PMID: 26825777 DOI: 10.1111/andr.12151] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/05/2015] [Accepted: 11/25/2015] [Indexed: 01/19/2023]
Abstract
Intake of full-fat dairy has been linked to lower semen quality but whether this leads to decreased fertility is unknown. To address this question, we prospectively evaluated the association of men's dairy intake with treatment outcomes of subfertile couples undergoing assisted reproductive technology (ART). We followed 142 men from couples undergoing infertility treatment with ART at an academic fertility centre between 2007 and 2014. Couples completed dietary assessments prior to treatment, and the female partners underwent a total of 248 ART cycles. Multivariable generalized linear mixed models were used to examine the association of dairy intake with fertilization, implantation, clinical pregnancy and live birth rates adjusting for age, body mass index, smoking status, total exercise time, dietary patterns, alcohol, caffeine, total energy intake, and female dairy intake. Intake of dairy foods, regardless of their fat content, was not associated with fertilization, implantation, clinical pregnancy or live birth rates. The adjusted live birth rates (95% confidence interval) for couples in increasing quartiles of men's dairy intake were 0.42 (0.25, 0.60), 0.25 (0.13, 0.42), 0.26 (0.15, 0.41), and 0.44 (0.27, 0.63) (p linear trend = 0.73). Results remained similar after adjustment for female partner intake of dairy foods. Overall, men's dairy intake was not associated with treatment outcomes of couples undergoing ART.
Collapse
Affiliation(s)
- Wei Xia
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu-Han Chiu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Myriam C Afeiche
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Paige L Williams
- Department of Epidemiology, Harvard T.H Chan School of Public Health, Boston, MA, USA.,Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Jennifer B Ford
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Cigdem Tanrikut
- Department of Urology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Irene Souter
- Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Russ Hauser
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T.H Chan School of Public Health, Boston, MA, USA.,Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T.H Chan School of Public Health, Boston, MA, USA.,Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | | |
Collapse
|
26
|
Mumford SL, Kim S, Chen Z, Barr DB, Louis GMB. Urinary Phytoestrogens Are Associated with Subtle Indicators of Semen Quality among Male Partners of Couples Desiring Pregnancy. J Nutr 2015; 145:2535-41. [PMID: 26423741 PMCID: PMC4620723 DOI: 10.3945/jn.115.214973] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 08/31/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Phytoestrogens have been associated with subtle hormonal changes, although effects on male fecundity are largely unknown. OBJECTIVE We evaluated associations between male urinary phytoestrogen (isoflavone and lignan) concentrations and semen quality. METHODS This study was a prospective cohort study of 501 male partners of couples desiring pregnancy and discontinuing contraception. Each participant provided up to 2 semen samples that were analyzed for 35 semen quality endpoints the following day. Linear mixed-effects models were used to estimate associations between baseline urinary phytoestrogen concentrations and semen quality parameters, adjusted for age, body mass index (BMI), research site, and serum lipid and cotinine concentrations. RESULTS Most associations between urinary phytoestrogens and semen quality parameters were null. However, select individual phytoestrogens were associated with semen quality parameters, with associations dependent on the class of phytoestrogens and modified by BMI. Specifically, genistein and daidzein were associated with a lower percentage of normal sperm and increased abnormalities in semen morphology, with reduced associations observed as BMI increased (P < 0.05) [percentages (95% CIs) of normal morphology by WHO traditional criteria: genistein, main effect: -5.61% (-9.42%, -1.79%); interaction: 0.19% (0.06%, 0.31%) per log unit increase; daidzein, main effect: -5.35% (-9.36%, -1.34%); interaction: 0.18% (0.05%, 0.32%) per log unit increase]. Enterolactone was associated with fewer abnormalities in semen morphometry and morphology and decreased DNA fragmentation, with reduced associations observed as BMI increased (P < 0.05) [percentages (95% CIs) of abnormalities in the neck and midpiece: enterolactone, main effect: -3.35% (-6.51%, -0.19%); interaction: 0.11% (0.01%, 0.21%) per log unit increase]. CONCLUSIONS These results suggest that male urinary phytoestrogen concentrations characteristic of the US population may be associated with subtle indicators of male fecundity and semen quality but were not associated with couple fecundity.
Collapse
Affiliation(s)
- Sunni L Mumford
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Department of Health and Human Services, Bethesda, MD; and
| | - Sungduk Kim
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Department of Health and Human Services, Bethesda, MD; and
| | - Zhen Chen
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Department of Health and Human Services, Bethesda, MD; and
| | - Dana Boyd Barr
- Rollins School of Public Health, Emory University, Atlanta, GA
| | - Germaine M Buck Louis
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Department of Health and Human Services, Bethesda, MD; and
| |
Collapse
|