Maternal nutrition and perinatal outcomes

The effects of pregnancy-related changes in eating attitudes and behaviours on nutritional status

BACKGROUND

During pregnancy, the requirements of essential nutrients for the mother and foetus increase. The changes in pregnant women's eating behaviours may vary according to their sociodemographic characteristics. It is important to meet these increased requirements and understand the factors influencing eating habits during pregnancy.

OBJECTIVES

This study aimed to determine the effects of changes in pregnant women's eating attitudes and behaviours and their sociodemographic characteristics on their meeting status for nutrient recommendations.

METHODS

Sociodemographic information, eating behaviours, and attitudes of 656 pregnant women were obtained in face-to-face interviews between February and June 2020. Food consumption records were taken with a 24-hour recall method and evaluated according to the estimated average requirement value.

RESULTS

The average age of pregnant women was 29.0 ± 5.2 years, 28.0% were high school graduates, and 69.2% were non-working. The frequency of intakes below the estimated mean requirement value were iron, folic acid, vitamin B6, niacin, and calcium. It was demonstrated that there was a significant difference in snack consumption based on the working status and nutrition information obtained (P < .05). Getting nutrition information, age, education level, working status, and pre-pregnancy body mass index significantly increased food consumption (P < .05).

CONCLUSION

Inadequate nutrient intake is a common public health problem in pregnant women. It is necessary to identify the sociodemographic characteristics that negatively impact pregnant women's nutritional status and to develop nutrition and health education programs based on these features.

Adherence to plant-based diet during pregnancy and risk of gestational diabetes: a prospective birth cohort study

BACKGROUND

Studies have shown that plant-based foods have a protective effect against gestational diabetes (GDM). We examined the association between plant-based dietary patterns and the risk of GDM in a sample of Iranian adults.

METHODS

We enrolled 635 pregnant women for the present study. Dietary intakes were evaluated by using a 90-item food frequency questionnaire during the first trimester of pregnancy. Three plant-based including plant-based (PDI), unhealthy (uPDI) and healthy (hPDI) were calculated. Cox proportional hazard model were fitted to estimate hazard ratio (HR) and 95% confidence interval (CI) of GDM across categories of the plan-based dietary indices, while controlling for age, educational level, physical activity, family income, prepregnancy body mass index, gestational weight gain, and total energy intake.

RESULTS

A total of 635 mothers were included, of whom 79 participants were diagnosed with GDM. Those in the third tertile of the PDI (HR: 0.55, 95% CI: 0.30, 0.98) and hPDI (HR: 0.43, 95% CI: 0.24, 0.78) had a lower risk of developing GDM during their current pregnancy as compared to the first tertile. There was no association between uPDI and risk of GDM.

CONCLUSIONS

We found that higher adherence to a plant-based diet during early pregnancy may be associated with a lower GDM risk among Iranian women. Confirmation of this finding is necessary in larger cohort studies, taking into account other pregnancy outcomes such as birth weight.

Perinatal outcomes of socially disadvantaged women in Australia: A population-based retrospective cohort study

OBJECTIVE

To examine the perinatal outcomes of women who experience social disadvantage using population-based perinatal data collected between 1999 and 2016.

DESIGN

Population-based, retrospective cohort study.

SETTING

Victoria, Australia.

POPULATION OR SAMPLE

A total of 1 188 872 singleton births were included.

METHODS

Cohort study using routinely collected perinatal data. Multiple logistic regression was performed to determine associations between social disadvantage and adverse maternal and neonatal outcomes with confidence limits set at 99%. Time-trend analysis for perinatal outcomes was performed in relation to area-level disadvantage measures.

MAIN OUTCOME MEASURES

Incidence of maternal admission to intensive care unit (ICU), postpartum haemorrhage (PPH) and caesarean section, perinatal mortality, preterm birth, low birthweight (LBW), and admission to special care nursery/neonatal intensive care unit (SCN/NICU).

RESULTS

Social disadvantage was associated with higher odds of adverse perinatal outcomes. Disadvantaged women were more likely to be admitted to ICU, have a PPH or experience perinatal mortality (stillbirth or neonatal death) and their neonates were more likely to be admitted to SCN/NICU, be born preterm and be LBW. A persistent social gradient existed across time for the most disadvantaged women for all outcomes except caesarean section.

CONCLUSIONS

Social disadvantage has a marked negative impact on perinatal outcomes. This aligns with national and international evidence regarding the impact of disadvantage. Strategies that improve access to, and reduce fragmentation in, maternity care in addition to initiatives that address the social determinants of health may contribute to improving perinatal outcomes for socially disadvantaged women.

A Comprehensive Review on Social Inequalities and Pregnancy Outcome-Identification of Relevant Pathways and Mechanisms

Scientific literature tends to support the idea that the pregnancy and health status of fetuses and newborns can be affected by maternal, parental, and contextual characteristics. In addition, a growing body of evidence reports that social determinants, measured at individual and/or aggregated level(s), play a crucial role in fetal and newborn health. Numerous studies have found social factors (including maternal age and education, marital status, pregnancy intention, and socioeconomic status) to be linked to poor birth outcomes. Several have also suggested that beyond individual and contextual social characteristics, living environment and conditions (or "neighborhood") emerge as important determinants in health inequalities, particularly for pregnant women. Using a comprehensive review, we present a conceptual framework based on the work of both the Commission on Social Determinants of Health and the World Health Organization (WHO), aimed at describing the various pathways through which social characteristics can affect both pregnancy and fetal health, with a focus on the structural social determinants (such as socioeconomic and political context) that influence social position, as well as on intermediary determinants. We also suggest that social position may influence more specific intermediary health determinants; individuals may, on the basis of their social position, experience differences in environmental exposure and vulnerability to health-compromising living conditions. Our model highlights the fact that adverse birth outcomes, which inevitably lead to health inequity, may, in turn, affect the individual social position. In order to address both the inequalities that begin in utero and the disparities observed at birth, it is important for interventions to target various unhealthy behaviors and psychosocial conditions in early pregnancy. Health policy must, then, support: (i) midwifery availability and accessibility and (ii) enhanced multidisciplinary support for deprived pregnant women.

Relationship between psychological stress and ghrelin concentrations in pregnant women with overweight or obesity

Exposure to, perception of, and response to stress have all been shown to influence appetite and dietary behaviors in non-pregnancy human and animal studies, mediated in part by the appetite stimulating hormone ghrelin. Yet, the impact of prenatal stress on biological pathways associated with appetite in the context of pregnancy is not well understood. The objective of this study was to assess the relationship between these layered dimensions of stress with fasting and postprandial plasma ghrelin concentrations among Hispanic pregnant women with overweight or obesity, a population known to experience heightened levels of stress. Thirty-three non-diabetic Hispanic women with pre-pregnancy body mass index of 25.0-34.9 kg/m2 participated in a crossover study at 28-32 weeks' gestation. At each visit, participants provided fasting blood and saliva samples, consumed a standardized mixed-meal, and completed a 15-minute task: friendly conversation (control) or the Trier Social Stress Test (experimental stress exposure). Six timed blood and saliva samples were collected up to 2 h from baseline and assayed for ghrelin and cortisol, respectively, and area-under-the-curve (AUC) values were computed. Day-to-day stress levels were assessed by the Perceived Stress Scale. Physiological and psychological stress reactivity was determined by cortisol AUC and change in self-reported affect state, respectively, during the experimental stress visit. Maternal perceived stress was positively associated with ghrelin concentrations in the fasted (β = 0.06, p = 0.02) and postprandial state (β = 0.05, p = 0.02). Mean ghrelin AUC was not significantly different following acute stress versus control. Measures of acute stress reactivity were not associated with ghrelin AUC. Contrary to our hypothesis, among Hispanic pregnant women with overweight and obesity, exposure to an acute stress induction task did not alter postprandial ghrelin concentrations, and changes in individual psychological and physiological stress reactivity did not associate with postprandial ghrelin. However, our findings suggest that maternal report of general perceived stress over the last month is associated with higher fasting and postprandial ghrelin concentrations. Differences in the effects of short-term stress exposure versus day-to-day perception of stress on appetite and food intake in pregnancy deserves further investigation.

Prevalence of Vitamin D and Calcium Deficiency and Insufficiency in Women of Childbearing Age and Associated Risk Factors: A Systematic Review and Meta-Analysis

Vitamin D deficiency and insufficiency as well as low serum calcium levels can trigger negative health outcomes in women of childbearing age. Therefore, we aimed to estimate the prevalence of serum vitamin D and calcium deficiencies and insufficiencies and associated risk factors in Brazilian women of childbearing age and to assess whether there are differences in prevalence according to regions of the country and the presence or absence of pregnancy. The systematic literature review was performed using the following databases: PubMed, LILACS, Embase, Scopus, and Web of Science. Cross-sectional, cohort, and intervention studies were included. Among pregnant women, the prevalence of vitamin D deficiency ranged from 0% to 27% and of vitamin D insufficiency from 33.9% to 70.4%. Among non-pregnant women, the prevalence of vitamin D deficiency ranged from 0% to 41.7% and of vitamin D insufficiency from 38.5% to 69.3%. We found a high prevalence of vitamin D deficiency and insufficiency in women of childbearing age, with insufficiency affecting more than half of these women. The highest prevalence of vitamin D deficiency and insufficiency was observed in the South region. It was not possible to assess the prevalence and factors associated with calcium deficiency.

Prevalence of vitamin D and calcium deficiencies and their health impacts on women of childbearing age: a protocol for systematic review and meta-analysis

INTRODUCTION

No systematic reviews has synthesised data on the available evidence to determine the prevalence of calcium and vitamin D deficiencies as a public health problem globally. Therefore, this study presents a protocol for conducting a review and meta-analysis to estimate the prevalence of calcium and vitamin D serum deficiencies in women of childbearing age and stratify these data by age group, urban and rural area, world region and pregnant/non-pregnant women whenever possible.

METHODS AND ANALYSIS

The systematic review protocol involves conducting a literature search in the following databases: PubMed, LILACS, Embase, Scopus and Web of Science. The selected articles will be checked thoroughly, including the references to include grey literature. Cross-sectional studies and baseline data from cohort studies or clinical and community trials conducted with women of childbearing age with representative probabilistic sampling will be included. Two independent researchers will be responsible for article selection and data extraction, and discrepancies, if any, will be dealt with by a third reviewer. Methodological quality and risk of bias will be analysed using the Grading of Recommendations, Assessment, Development and Evaluations and Joanna Briggs Institute's checklist, respectively. The heterogeneity of the estimates between studies will also be evaluated. Dissemination of the key findings from the systematic review will help identify priorities for action, establish dietary guidelines, develop health-related public policies and reduce and combat micronutrient deficiencies among women of childbearing age and their children.

ETHICS AND DISSEMINATION

Formal ethical approval is not required, and findings will be published in a peer-reviewed journal.

PROSPERO REGISTRATION NUMBER

CRD42020207850.

The Influence of Diet on Ovulation Disorders in Women—A Narrative Review

Female infertility is commonly due to ovulation disorders. They are mostly related to polycystic ovary syndrome, which is currently viewed as one of the most common endocrine disorders in women of reproductive age. Ovulation-related female fertility is influenced by multiple factors which may include: age, smoking cigarettes, stress, use of psychoactive substances, and physical activity. Moreover, diet-related factors play an important role in the regulation of ovulation. Dietary components that exert a positive influence on ovulation include: carbohydrate products with low glycemic index, plant protein, monounsaturated and polyunsaturated fatty acids, folic acid, vitamin D, antioxidants, and iron. A diet based on the structure of the Mediterranean diet also seems beneficial. Components that have a negative influence mostly include high glycemic index carbohydrates, large amounts of animal protein, saturated fatty acids, and trans fatty acids, which are typically found in the Western model of nutrition. Due to the paucity of studies that presented a direct link between nutrition and the risk of anovulatory infertility, this study aimed to summarize the most recent research on the influence of dietary factors on ovulation disorders and indicate the possibilities of future research.

The Efficacy of a Personalized mHealth Coaching Program During Pregnancy on Maternal Diet, Supplement Use, and Physical Activity: Protocol for a Parallel-Group Randomized Controlled Trial

Background

Adequate intake of macro- and micronutrients and adoption of an active lifestyle during pregnancy are essential for optimum maternal and fetal health and offspring development. Dietary counseling and advice regarding adequate physical activity are integral components of antenatal care. Personalized coaching through the use of mobile health (mHealth) that supports behavior modification is an innovative approach that needs exploration.

Objective

Our primary aim is to assess the efficacy of an mHealth program in improving diet, supplement use, and physical activity during pregnancy. Secondary objectives include evaluation of the program’s effect on maternal and offspring health outcomes and assessment of its compliance and usability.

Methods

A randomized controlled trial was initiated at the Aga Khan University Hospital in Karachi, Pakistan, in January 2020. We aim to recruit 300 pregnant women in their first trimester who have smartphones, do not have comorbidities, and are not taking medications. The intervention group will be trained to use an mHealth app called PurUmeed Aaghaz. Through this app, the subjects will report information about their diet, supplement use, and physical activity and will receive personalized advice and three push messages as weekly reminders. The research assistant will obtain similar information from the control group via a paperless questionnaire; this group will receive standard face-to-face counseling regarding diet, supplement use, and physical activity. Data will be collected at enrollment and during four follow-up sessions scheduled 6 weeks apart. Primary study outcomes include improvements in diet (ie, change in mean dietary risk score from baseline to each follow-up), supplement use (ie, changes in mean supplement use score and biochemical levels of folic acid, iron, calcium, and vitamin D on a study subset), and mean duration of reported physical activity (minutes). Secondary study outcomes relate to maternal health (ie, gestational diabetes mellitus, gestational hypertension, pre-eclampsia, and gestational weight gain), newborn health (ie, birth weight and length and gestational age at delivery), and infant health (ie, BMI and blood pressure at 1 year of age). Compliance will be determined by the proportion of participants who complete the 6-month coaching program. Usability will be assessed based on features related to design, interface, content, coaching, perception, and personal benefit.

Results

The study was approved by the Ethics Review Committee of the Aga Khan University in 2017. The recruitment of study participants was completed in September 2021. All follow-ups and outcome assessments are expected to be completed by March 2023 and analysis is expected to be completed by June 2023. We expect the results to be published by the end of 2023.

Conclusions

This study will be an important step toward evaluating the role of mHealth in improving behaviors related to a healthy diet, supplement use, and promotion of physical activity during pregnancy, as well as in influencing maternal and offspring outcomes. If proven effective, mHealth interventions can be scaled up and included in antenatal care packages at tertiary care hospitals of low- and middle-income countries.

Trial Registration

ClinicalTrials.gov NCT04216446; https://clinicaltrials.gov/ct2/show/NCT04216446

International Registered Report Identifier (IRRID)

DERR1-10.2196/31611

What is needed to facilitate healthy dietary behaviours in pregnant women: A qualitative study of Dutch midwives' perceptions of current versus preferred nutrition communication practices in antenatal care

OBJECTIVE

The aim of this paper was to explore midwives' perceptions of current and preferred nutrition communication practices in antenatal care, and to identify what is needed to achieve their preferred practices.

DESIGN

A qualitative descriptive design was used. Semi-structured interviews were conducted with twenty Dutch midwives working in primary care or secondary care settings across the Netherlands. To create a positive atmosphere, interviews were based on the principles of Appreciative Inquiry.

FINDINGS

Opportunities identified in current practices included midwives' sense of responsibility, their skills and experience, availability of resources, and group consultations. Barriers were the precarity and lack of prioritization of the topic, and the current focus on food safety (risks). Ideally, midwives envisioned nutrition communication as a continuous trajectory, in which not only reliable and consistent information is provided, but also more personalized and positive communication, to empower pregnant women.

KEY CONCLUSIONS

Midwives favour nutrition communication practices characterized by continuity of care and woman-centeredness. Opportunities to realize such practices in antenatal care are the use of innovative tools to support nutrition communication, more sustainable collaborations with dietitians, and better nutrition education for midwives.

IMPLICATIONS FOR PRACTICE

Midwives could act as facilitators and gatekeepers in nutrition communication, requiring limited time and expertise from midwives, and empowering pregnant women.

The Impact of a Plant-Based Diet on Gestational Diabetes: A Review

Gestational diabetes mellitus (GDM) represents a challenging pregnancy complication in which women present a state of glucose intolerance. GDM has been associated with various obstetric complications, such as polyhydramnios, preterm delivery, and increased cesarean delivery rate. Moreover, the fetus could suffer from congenital malformation, macrosomia, neonatal respiratory distress syndrome, and intrauterine death. It has been speculated that inflammatory markers such as tumor necrosis factor-alpha (TNF-α), interleukin (IL) 6, and C-reactive protein (CRP) impact on endothelium dysfunction and insulin resistance and contribute to the pathogenesis of GDM. Nutritional patterns enriched with plant-derived foods, such as a low glycemic or Mediterranean diet, might favorably impact on the incidence of GDM. A high intake of vegetables, fibers, and fruits seems to decrease inflammation by enhancing antioxidant compounds. This aspect contributes to improving insulin efficacy and metabolic control and could provide maternal and neonatal health benefits. Our review aims to deepen the understanding of the impact of a plant-based diet on oxidative stress in GDM.

Effect of low trans-fatty acid intakes on preeclampsia: A randomized controlled trial

Background:

Preeclampsia (PE) is a high blood pressure disorder accompanied by proteinuria during pregnancy. It remains unclear whether dietary trans-fatty acid (TFA) can influence PE risk. We examined the effect of low TFA dietary intakes during pregnancy on the risk of PE.

Materials and Methods:

We conducted a randomized open-label controlled trial on 800 pregnant women admitted to public health centers from May 2014 to August 2016. In the intervention group, participants received a diet with TFA <1% and those in the comparison group, participants had dietary intakes with no change on TFA content. Dietary intakes were assessed by 24-h recalls at the first prenatal care visit (<8 weeks) and at gestational ages of 13, 25, and 35 weeks. The hazard ratio (95% confidence interval [CI]) for PE was calculated using the Cox proportional-hazards model.

Results:

There were statistically significant differences in intakes of daily TFAs between the groups (P < 0.05). The hazard ratio (95% CI) for the incidence of PE in the intervention group was 0.56 (0.33–0.93).

Conclusion:

Low TFA dietary intake during pregnancy reduced the risk of PE.

Randomized controlled trial of the COPE-P intervention to improve mental health, healthy lifestyle behaviors, birth and post-natal outcomes of minority pregnant women: Study protocol with implications

BACKGROUND

Emotionally distressed pregnant minority women experience multiple adverse outcomes, including pre-eclampsia, preterm birth, operative deliveries and low birth weight. Although the United States Preventive Services Task Force recommends screening in pregnant women, many practices do not screen because efficacious interventions and systems are not in place to treat them.

AIM

Purpose of this randomized controlled trial (RCT) is to test a group delivered manualized cognitive-behavioral skills building intervention entitled COPE-P versus an attention control program on the mental health, birth and postpartum outcomes of minority pregnant women experiencing depressive, anxiety and stress symptoms.

METHODS

Design is a longitudinal randomized block RCT with repeated measures (beginning with screening prior to 18 weeks, group prenatal care in both groups from 16 + 1 to 31 + 1 weeks and ending at 6 months postpartum) at two study sites (New York city and Columbus, Ohio). Race/ethnicity is being blocked to ensure equal numbers of Hispanic and Black women. 384 women are being recruited from antenatal clinics if they are: between 18 and 40 years; in an uncomplicated singleton pregnancy <18 weeks; and self-identify as Black or Hispanic. Valid and reliable measures are being used to assess healthy lifestyle behaviors and mental health outcomes immediately following the interventions, six - eight weeks postpartum and at the children's six-month well baby visit. Birth and delivery outcomes also are being assessed.

CONCLUSION

If found to be efficacious, the COPE-P intervention could be a key solution to managing those with emotional distress and improving their outcomes.

Hábitos alimentares das gestantes brasileiras:revisão integrativa da literatura

Resumo Os hábitos alimentares das mulheres grávidas são influenciados por diversos fatores, sendo essencial conhecê-los para poder realizar intervenções nutricionais na atenção pré-natal. O objetivo desta revisão integrativa foi analisar a produção bibliográfica sobre hábitos alimentares de gestantes brasileiras. Foram buscados artigos na Biblioteca Virtual em Saúde (BVS), PubMed, Scopus, Web of Science e na Scientific Eletronic Library Online (SciELO) utilizando os seguintes descritores: “Gestantes” OR “Grávidas” AND “Hábitos Alimentares” e os termos “Pregnant women” AND “Food habits” AND “Brazil” para busca em inglês. Após a adoção dos critérios de inclusão e exclusão foram analisados 18 estudos. Alguns estudos contemplaram populações específicas como adolescentes ou gestantes não obesas. O instrumento mais utilizado para investigação do consumo alimentar de gestantes foi o Questionário de Frequência Alimentar. A maioria mostrou que a dieta das gestantes precisa de melhorias, especialmente pelo baixo consumo de frutas, verduras e hortaliças, elevado consumo de açúcares, doces e gorduras. A maioria dos estudos concluiu e reforçou a importância e a necessidade da educação nutricional pelos profissionais atuantes no pré-natal. Mais estudos são necessários para compreensão mais acurada destes hábitos alimentares.

Role of omega-3 polyunsaturated fatty acids in gestational diabetes, maternal and fetal insights: current use and future directions

ω-3-Polyunsaturated fatty acids (ω-3 PUFAs) are widely used during pregnancy and gestational diabetes mellitus (GDM). ω-3 PUFAs are beneficial in the regulation of maternal and fetal metabolic function, inflammation, immunity, macrosomia (MAC), oxidative stress, preeclampsia, intrauterine growth, preterm birth, offspring metabolic function, and neurodevelopment. Dietary counseling is vital for improving therapeutic outcomes in patients with GDM. In maternal circulation, ω-3 PUFAs are transported via transporters, synthesis enzymes, and intracellular proteins, which activate nuclear receptors and play central roles in the cellular metabolic processes of placental trophoblasts. In patients with GDM, this process is compromised due to abnormal functioning of the placenta, which disrupts the normal mother to fetus transport. This results in reduced fetal levels of ω-3 PUFAs, which contributes negatively to fetal growth, metabolic function, and development. Dietary counseling and nutritional assessment remain challenging in the prevention and alleviation of GDM. Therefore, personalized approaches, including measurement of the ω-3 index, pharmacogenetic implementation strategies, and appropriate supplementation with ω-3 PUFAs are used to achieve sufficient distribution in the maternal and fetal fluids during the entire pregnancy period. Developing new dosing guidelines and personalized approaches, determining the mechanisms of ω-3 PUFAs in the placenta, and examining the pharmacodynamic and pharmacokinetics interactions involving ω-3 PUFAs will lead to better management and increase the quality of life of patients with GDM and their offspring. Moreover, different strategies for supplementing with ω-3 PUFAs, improving their placental transport, and pharmacological exploration of the maternal-fetal interactions will help to further elucidate the role of ω-3 PUFAs in women with GDM. In this review, we summarize the current information on the potential therapeutic benefits and clinical applicability of ω-3 PUFAs in patients with GDM and their offspring, highlighting recent progress and future perspectives in this field. Studies investigating the mechanisms of ω-3 PUFA transport to targeted tissues have spurred an interest in personalized treatment strategies for patients with GDM and their offspring. To implement such therapies, we need to clarify the index/ratio of ω-3 PUFAs in maternal and fetal fluids, delineate the ω-3 PUFA transport pathways, and establish the guidelines for FA profiling prepregnancy and during pregnancy-associated weight gain. Such therapies also need to take into account the gender of the fetus, and whether the patient is obese.

Effectiveness of recruitment and retention strategies in a pregnant adolescent nutrition intervention study

AIM

To report the methodological strategies used to recruit and retain pregnant adolescents into a nutrition-focused intervention study.

BACKGROUND

An important step to meeting the developmental and healthcare needs of pregnant adolescents is to conduct high-quality research studies that generate reliable and accurate data. However, recruitment and retention of pregnant adolescents into research are challenging and time intensive.

DESIGN

A quasi-experimental, one-group, pre, post, 6-week postintervention repeated measures study was conducted among inner-city pregnant adolescents.

METHOD

Study participants' nutrition knowledge, eating habits, and personal self-efficacy were measured prior to pregnant adolescents' participation in the workshop, immediately after the intervention and 6-weeks following the intervention. A total of four workshops were conducted over 14 months from 2014-2015.

RESULTS

Gatekeepers were influential in recruitment efforts due to trusting relationship they had with study participants. The use of texting reminders and pregnant adolescent-related incentives that included gift bags and baby items were also effective recruitment and retention strategies. Despite designing the recruitment strategies and using a developmentally tailored workshop, based on empirical evidence gleaned from pregnant adolescents that was modified to meet study participant's schedules, an adequate sample was unable to be recruited and retained for this study.

CONCLUSION

High-quality research studies that generate reliable and accurate data are essential in meeting the developmental and healthcare needs of pregnant adolescents. A major barrier in developing evidence-based care practices to promote the health of these young mothers and their children involves recruiting and retaining them in research studies.

A Healthy Eating Education Program for Midwives to Investigate and Explore Their Knowledge, Understanding, and Confidence to Support Pregnant Women to Eat Healthily: Protocol for a Mixed-Methods Study

Background

Nutrition and healthy eating behaviors during pregnancy are vitally important for the health of a mother and her developing baby. However, some midwives have reported a lack of evidence-based nutrition knowledge for providing information about healthy eating to women during pregnancy.

Objective

In this study, the aim is to design and evaluate a healthy eating education program to enhance midwives’ knowledge, understanding, and confidence to support pregnant women in South Australia to make healthy eating choices.

Methods

This mixed-methods study consists of two phases. The first phase, Phase 1, consists of an education program for midwives, “Healthy Eating in Pregnancy,” to be delivered through a workshop or webinar. Each midwife will attend one workshop or webinar, which will be approximately two hours in length. This program will be evaluated through pre-, immediate-, and post-educational questionnaires utilizing a website specifically designed for this study. The participants will be midwives who are members of the Australian College of Midwives and the Australian Nursing and Midwives Federation, and users of social media (eg, Facebook and Twitter) residing and employed in South Australia. Phase 2 will consist of semistructured interviews with a purposive sample of midwives. These interviews will be undertaken to gain an in-depth understanding of midwives’ views and how confident they feel educating pregnant women after receiving the healthy eating education. Interviews will be face-to-face or conducted by telephone with midwives who have participated in the healthy eating educational program.

Results

A systematic review has previously been undertaken to inform this study protocol. This paper describes and discusses the protocol for this mixed-methods study, which will be completed in April 2019.

Conclusions

The results from the systematic review suggest that there is clear justification to undertake this mixed-methods study to investigate and explore midwives’ knowledge, understanding and confidence to support healthy eating in pregnant women. The results and conclusions from the systematic review provided some guidance for the design and development of this study protocol. This mixed-methods study will address a gap in the literature. The results from quantitative and qualitative data sources in this proposed study will help to draw conclusions to address the research topic.

Registered Report Identifier

RR1-10.2196/9861

Exploring health education with midwives, as perceived by pregnant women in primary care: A qualitative study in the Netherlands

OBJECTIVE

to explore the experiences, wishes and needs of pregnant women with respect to health education in primary care with midwives.

DESIGN

qualitative semi-structured interview study, using thematic analysis and constant comparison.

SETTING AND PARTICIPANTS

twenty-two pregnant women in midwife-led primary care, varying in socio-demographic characteristics, weeks of pregnancy and region of residence in the Netherlands, were interviewed between April and December 2013.

FINDINGS

women considered midwives to be the designated health caregivers for providing antenatal health education, and generally appreciated the information they had received from their midwives. Some women, however, believed the amount of verbal health information was insufficient; others that there was too much written information. Many women still had questions and expressed uncertainties regarding various health issues, such as weight gain, alcohol, and physical activity. They perceived their health education to be individualised according to their midwives' assessments of the extent of their knowledge, as well as by the questions they asked themselves. A few were concerned that midwives may make incorrect assumptions about the extent of their knowledge. Women also varied in how comfortable they felt about contacting their midwives for questions between antenatal visits. Women felt that important qualities for midwives underlying health education, were making them feel at ease and building a relationship of trust with them.

KEY CONCLUSIONS AND IMPLICATIONS FOR PRACTICE

health education was highly appreciated by women in general, suggesting that midwives should err on the side of providing too much verbal information, as opposed to too little. A more pro-active approach with information provision may be of value not only to those with a clear desire for more information, but also to those who are unsure of what information they may be missing. As midwives are the principal health care providers throughout pregnancy,they should ideally emphasise their availability for questions between antenatal visits.

Development of an Interactive Pregnant Adolescent Nutrition Education Workshop

The health of pregnant adolescents affects the well-being of future generations. Modifying unhealthy eating patterns among pregnant adolescents is critical because of their association with risk of poor pregnancy and birth outcomes. Therefore, it is important to provide age- and developmentally appropriate nutrition education during this time. To sustain healthy behavior changes, nutrition interventions must be grounded in theory and reflect both motivating factors and barriers to healthy eating. Factors such as taste preferences, personal self-efficacy, developmentally appropriate nutrition education, and hands-on meal preparation have been identified as influences on dietary patterns in this population. The purpose of this article is to describe the development of an evidence-based nutrition education program for pregnant adolescents based on Pender's health promotion model.

[High prevalence of inadequate calcium and vitamin D dietary intake in two cohorts of pregnant women]

This study aimed to identify the prevalence of inadequate calcium and vitamin D dietary intake and related factors in two cohorts of pregnant women according to trimester of pregnancy. Two 24-hour dietary recall tests were taken in each trimester, one pertaining to weekends. Variables significantly correlated with intake of these nutrients were included in a multivariate linear regression model, adjusted for energy. Prevalence of inadequate intake was estimated according to the National Cancer Institute method (United States). In cohort A, inadequate vitamin D did not differ between trimesters; in B there was a reduction: from 99.7% in the first trimester to 97.1% in the third. In cohorts A and B, inadequate calcium intake exceeded 70%, falling slightly from the first (89.2% and 81.4%) to the second (79.7% and 69.1%) and third trimesters (82.7% and 72.6%). There was no correlation between maternal variables and the intake of these micronutrients. In conclusion, intake of vitamin D and calcium is seriously inadequate and distributed homogeneously among pregnant women in the primary healthcare network.

Educational intervention regarding diet and physical activity for pregnant women: changes in knowledge and practices among health professionals

BACKGROUND

The knowledge and practices of health professionals have a recognized role in behaviors related to the health of their patients. During pregnancy, this influence can be even stronger because there is frequent contact between women and doctors/nurses at periodic antenatal visits. When trained, supported and motivated, these professionals can act as health promoters. This study aimed to evaluate the effect of a focused educational intervention on improving the knowledge and practices of health professionals concerning diet and physical activity during pregnancy.

METHODS

A controlled, non-randomized study was performed to assess the effects of an educational intervention on the knowledge and practices of nurses and doctors who provide primary care to pregnant women. The intervention group, doctors and nurses (n = 22) from the family health units in a medium-sized city of São Paulo State, Brazil, received 16 h of training comprising an introductory course and three workshops, whereas the control group, doctors and nurses (n = 20) from traditional basic health units in Botucatu, did not. The professionals' knowledge was assessed at two time points, 1 month prior to and 1 year after the beginning of the intervention, using an ad hoc self-report questionnaire. The increases in the knowledge scores for walking and healthy eating of the intervention and control groups were calculated and compared using Student's t-test. To analyze the professionals' practice, women in the second trimester of pregnancy were asked whether they received guidance on healthy eating and leisure-time walking; 140 of these women were cared for by professionals in the intervention group, and 141 were cared for by professionals in the control group. The percentage of pregnant women in each group that received guidance was compared using the chi-square test and the Prevalence Ratio (PR), and the corresponding 95 % confidence intervals (CI) were calculated.

RESULTS

The intervention improved the professionals' knowledge regarding leisure-time walking (92 % increase in the score, p < 0.001). The women who were cared for by the intervention group were more likely to receive guidance regarding leisure-time walking (PR = 2.65; 95 % CI = 1.82-3.83) and healthy eating (PR = 1.76; 95 % CI = 1.34-2.31) when compared to the control group.

CONCLUSION

It is possible to improve the knowledge and practices of health professionals through the proposed intervention aimed at primary health care teams providing antenatal care.

Quantifying the impact of rising food prices on child mortality in India: a cross-district statistical analysis of the District Level Household Survey

BACKGROUND

Rates of child malnutrition and mortality in India remain high. We tested the hypothesis that rising food prices are contributing to India's slow progress in improving childhood survival.

METHODS

Using rounds 2 and 3 (2002-08) of the Indian District Level Household Survey, we calculated neonatal, infant and under-five mortality rates in 364 districts, and merged these with district-level food price data from the National Sample Survey Office. Multivariate models were estimated, stratified into 27 less deprived states and territories and 8 deprived states ('Empowered Action Groups').

RESULTS

Between 2002 and 2008, the real price of food in India rose by 11.7%. A 1% increase in total food prices was associated with a 0.49% increase in neonatal (95% confidence interval (CI): 0.13% to 0.85%), but not infant or under-five mortality rates. Disaggregating by type of food and level of deprivation, in the eight deprived states, we found an elevation in neonatal mortality rates of 0.33% for each 1% increase in the price of meat (95% CI: 0.06% to 0.60%) and 0.10% for a 1% increase in dairy (95% CI: 0.01% to 0.20%). We also detected an adverse association of the price of dairy with infant (b = 0.09%; 95% CI: 0.01% to 0.16%) and under-five mortality rates (b = 0.10%; 95% CI: 0.03% to 0.17%). These associations were not detected in less deprived states and territories.

CONCLUSIONS

Rising food prices, particularly of high-protein meat and dairy products, were associated with worse child mortality outcomes. These adverse associations were concentrated in the most deprived states.

Environmental, Behavioral, and Cultural Factors That Influence Healthy Eating in Rural Women of Childbearing Age: Findings From a PhotoVoice Study

Despite increasing recognition of the role nutrition plays in the health of current and future generations, many women struggle to eat healthy. We used the PhotoVoice method to engage 10 rural women in identifying perceived barriers and facilitators to healthy eating in their homes and community. They took 354 photographs, selected and wrote captions for 62 images, and explored influential factors through group conversation. Using field notes and participant-generated captions, the research team categorized images into factors at the individual, relational, community/organizational, and societal levels of a socioecological model. Barriers included limited time, exposure to marketing, and the high cost of food. Facilitators included preparing food in advance and support from non-partners; opportunities to hunt, forage, and garden were also facilitators, which may be amplified in this rural environment. Nutritional interventions for rural women of childbearing age should be multi-component and focus on removing barriers at multiple socioecological levels.

Certified Nurse-Midwives' Experiences with Gestational Weight Management

Excessive gestational weight gain is associated with fetal metabolic reprogramming and subsequent childhood obesity, as well as maternal recalcitrant obesity and its successive morbidities. We conducted a review of the literature and an explorative, descriptive study of the techniques and strategies used by a subset of certified nurse-midwives to help women achieve optimal gestational weight gain. We also identified barriers to this outcome. With more effective management approaches to gestational weight gain, adverse maternal and neonatal health outcomes could potentially be prevented. http://dx.doi.org/10.1016/j.nwh.2015.12.007.

Socio-demographic inequalities across a range of health status indicators and health behaviours among pregnant women in prenatal primary care: a cross-sectional study

Background

Suboptimal maternal health conditions (such as obesity, underweight, depression and stress) and health behaviours (such as smoking, alcohol consumption and unhealthy nutrition) during pregnancy have been associated with negative pregnancy outcomes. Our first aim was to give an overview of the self-reported health status and health behaviours of pregnant women under midwife-led primary care in the Netherlands. Our second aim was to identify potential differences in these health status indicators and behaviours according to educational level (as a proxy for socio-economic status) and ethnicity (as a proxy for immigration status).

Methods

Our cross-sectional study (data obtained from the DELIVER multicentre prospective cohort study conducted from September 2009 to March 2011) was based on questionnaires about maternal health and prenatal care, which were completed by 6711 pregnant women. The relationships of education and ethnicity with 13 health status indicators and 10 health behaviours during pregnancy were examined using multilevel multiple logistic regression analyses, adjusted for age, parity, number of weeks pregnant and either education or ethnicity.

Results

Lower educated women were especially more likely to smoke (Odds Ratio (OR) 11.3; 95 % confidence interval (CI) 7.6– 16.8); have passive smoking exposure (OR 6.9; 95 % CI 4.4–11.0); have low health control beliefs (OR 10.4; 95 % CI 8.5–12.8); not attend antenatal classes (OR 4.5; 95 % CI 3.5–5.8) and not take folic acid supplementation (OR 3.4; 95 % CI 2.7–4.4). They were also somewhat more likely to skip breakfast daily, be obese, underweight and depressed or anxious. Non-western women were especially more likely not to take folic acid supplementation (OR 4.5; 95 % CI 3.5–5.7); have low health control beliefs (OR 4.1; 95 % CI 3.1–5.2) and not to attend antenatal classes (OR 3.3; 95 % CI 2.0–5.4). They were also somewhat more likely to have nausea, back pains and passive smoking exposure.

Conclusions

Substantial socio-demographic inequalities persist with respect to many health-related issues in medically low risk pregnancies in the Netherlands. Improved strategies are needed to address the specific needs of socio-demographic groups at higher risk and the structures underlying social inequalities in pregnant women.

Plant-Based and Plant-Rich Diet Patterns during Gestation: Beneficial Effects and Possible Shortcomings

Environmental and lifestyle factors are known to play an important role during gestation, determining newborns' health status and influencing their risk of being subject to certain noncommunicable diseases later in life. In particular, maternal nutritional patterns characterized by a low intake of plant-derived foods could increase the risk of gestation-related issues, such as preeclampsia and pregravid obesity, increase genotoxicant susceptibility, and contribute to the onset of pediatric diseases. In particular, the risk of pediatric wheeze, diabetes, neural tube defects, orofacial clefts, and some pediatric tumors seems to be reduced by maternal intake of adequate amounts of vegetables, fruits, and selected antioxidants. Nevertheless, plant-based diets, like any other diet, if improperly balanced, could be deficient in some specific nutrients that are particularly relevant during gestation, such as n-3 (ω-3) fatty acids, vitamin B-12, iron, zinc, and iodine, possibly affecting the offspring's health state. Here we review the scientific literature in this field, focusing specifically on observational studies in humans, and highlight protective effects elicited by maternal diets enriched in plant-derived foods and possible issues related to maternal plant-based diets.

Intrauterine nutrition: long-term consequences for vascular health

There is a growing body of evidence that improper intrauterine nutrition may negatively influence vascular health in later life. Maternal malnutrition may result in intrauterine growth retardation and, in turn, metabolic disorders such as insulin resistance, diabetes, hypertension, and dyslipidemia, and also enhanced risk of atherosclerosis and cardiovascular death in the offspring. Energy and/or protein restriction is the most critical determinant for fetal programming. However, it has also been proposed that intrauterine n-3 fatty acid deficiency may be linked to later higher blood pressure levels and reduced insulin sensitivity. Moreover, it has been shown that inadequate supply of micronutrients such as folate, vitamin B12, vitamin A, iron, magnesium, zinc, and calcium may contribute to impaired vascular health in the progeny. In addition, hypertensive disorders of pregnancy that are linked to impaired placental blood flow and suboptimal fetal nutrition may also contribute to intrauterine growth retardation and aggravated cardiovascular risk in the offspring. On the other hand, maternal overnutrition, which often contributes to obesity and/or diabetes, may result in macrosomia and enhanced cardiometabolic risk in the offspring. Progeny of obese and/or diabetic mothers are relatively more prone to develop obesity, insulin resistance, diabetes, and hypertension. It was demonstrated that they may have permanently enhanced appetites. Their atheromatous lesions are usually more pronounced. It seems that, particularly, a maternal high-fat/junk food diet may be detrimental for vascular health in the offspring. Fetal exposure to excessive levels of saturated fatty and/or n-6 fatty acids, sucrose, fructose and salt, as well as a maternal high glycemic index diet, may also contribute to later enhanced cardiometabolic risk.

Development and validation of an educational booklet for healthy eating during pregnancy

OBJECTIVE

to describe the validation process of an educational booklet for healthy eating in pregnancy using local and regional food.

METHODS

methodological study, developed in three steps: construction of the educational booklet, validation of the educational material by judges, and by pregnant women. The validation process was conducted by 22 judges and 20 pregnant women, by convenience selection. We considered a p-value<0.85 to validate the booklet compliance and relevance, according to the six items of the instrument. As for content validation, the item-level Content Validity Index (I-CVI) was considered when a minimum score of at least 0.80 was obtained.

RESULTS

five items were considered relevant by the judges. The mean I-CVI was 0.91. The pregnant women evaluated positively the booklet. The suggestions were accepted and included in the final version of the material.

CONCLUSION

the booklet was validated in terms of content and relevance, and should be used by nurses for advice on healthy eating during pregnancy.

The social determinants of infant mortality and birth outcomes in Western developed nations: a cross-country systematic review

Infant mortality (IM) and birth outcomes, key population health indicators, have lifelong implications for individuals, and are unequally distributed globally. Even among western industrialized nations, striking cross-country and within-country patterns are evident. We sought to better understand these variations across and within the United States of America (USA) and Western Europe (WE), by conceptualizing a social determinants of IM/birth outcomes framework, and systematically reviewing the empirical literature on hypothesized social determinants (e.g., social policies, neighbourhood deprivation, individual socioeconomic status (SES)) and intermediary determinants (e.g., health behaviours). To date, the evidence suggests that income inequality and social policies (e.g., maternal leave policies) may help to explain cross-country variations in IM/birth outcomes. Within countries, the evidence also supports neighbourhood SES (USA, WE) and income inequality (USA) as social determinants. By contrast, within-country social cohesion/social capital has been underexplored. At the individual level, mixed associations have been found between individual SES, race/ethnicity, and selected intermediary factors (e.g., psychosocial factors) with IM/birth outcomes. Meanwhile, this review identifies several methodological gaps, including the underuse of prospective designs and the presence of residual confounding in a number of studies. Ultimately, addressing such gaps including through novel approaches to strengthen causal inference and implementing both health and non-health policies may reduce inequities in IM/birth outcomes across the western developed world.

Validity of a diet history questionnaire estimating β-carotene, vitamin C and α-tocopherol intakes in Japanese pregnant women

We investigated the validity and reproducibility of a self-administered diet history questionnaire (DHQ) that estimates the intakes of β-carotene, vitamin C and α-tocopherol. Ninety-five healthy women with singleton pregnancies in the second trimester were examined at a university hospital in Tokyo. The intakes of β-carotene, vitamin C and α-tocopherol assessed by the DHQ were compared to the corresponding serum concentrations. To assess the reproducibility, 58 pregnant women completed it in two sessions within a 4-5 week interval. We found significantly positive correlations between the energy-adjusted intakes and serum concentrations of β-carotene and vitamin C (r = 0.254 and r = 0.323, respectively). However, α-tocopherol intake was not associated with the corresponding serum concentration. The intraclass correlation coefficients of the two-time DHQ were 0.743 (β-carotene), 0.665 (vitamin C) and 0.718 (α-tocopherol). DHQ has acceptable validity and reproducibility for β-carotene and vitamin C intakes in Japanese pregnant women.

Breastfeeding and early brain development: the Generation R study

Breastfeeding during infancy is associated with a range of short- and long-term health benefits. We examine whether breastfeeding in the first 2 months of life is associated with structural markers of brain development in infants from the general population. This study was embedded within the Generation R study. Cranial ultrasounds were obtained at approximately 7 weeks post-natal age. The diameter of the gangliothalamic ovoid, corpus callosum length, ventricular volume and head circumference were measured. Maternal reports of breastfeeding were obtained at 2 months of age. We examined associations in relation to current breastfeeding practices (exclusively breastfed, n = 318, breast- and bottle-fed, n = 119, and bottle-fed, n = 243). Analyses were adjusted for head size and relevant covariates. Secondary analyses were conducted for breastfeeding history (exclusively breastfed, n = 318, breast- and bottle-fed, n = 281, and never breastfed, n = 81). Exclusive breastfeeding was associated with more optimal brain development compared with babies who were bottle-fed or never breastfed. Results were most consistent for gangliothalamic ovoid diameter. Larger gangliothalamic ovoid diameters were evident in babies who were exclusively breastfed compared with bottle-fed babies [difference between means (95% confidence interval) = 0.21(0.02, 0.39), P = 0.02]. Smaller ventricular volume and larger head circumference were also found for exclusively breastfed babies. Breastfeeding was not significantly associated with corpus callosum length. Maternal reports of breastfeeding are associated with more mature brain development within the first 2 months of life. Results are most consistent for gangliothalamic ovoid diameter, a subcortical structure rich in docosahexaenoic acid. Findings also pointed to non-specific neural developmental advantage for exclusively breastfed babies.

Walnuts improve semen quality in men consuming a Western-style diet: randomized control dietary intervention trial

We tested the hypothesis that 75 g of whole-shelled walnuts/day added to the Western-style diet of healthy young men would beneficially affect semen quality. A randomized, parallel two-group dietary intervention trial with single-blind masking of outcome assessors was conducted with 117 healthy men, age 21-35 yr old, who routinely consumed a Western-style diet. The primary outcome was improvement in conventional semen parameters and sperm aneuploidy from baseline to 12 wk. Secondary endpoints included blood serum and sperm fatty acid (FA) profiles, sex hormones, and serum folate. The group consuming walnuts (n = 59) experienced improvement in sperm vitality, motility, and morphology, but no change was seen in the group continuing their usual diet but avoiding tree nuts (n = 58). Comparing differences between the groups from baseline, significance was found for vitality (P = 0.003), motility (P = 0.009), and morphology (normal forms; P = 0.04). Serum FA profiles improved in the walnut group with increases in omega-6 (P = 0.0004) and omega-3 (P = 0.0007) but not in the control group. The plant source of omega-3, alpha-linolenic acid (ALA) increased (P = 0.0001). Sperm aneuploidy was inversely correlated with sperm ALA, particularly sex chromosome nullisomy (Spearman correlation, -0.41, P = 0.002). Findings demonstrated that walnuts added to a Western-style diet improved sperm vitality, motility, and morphology.

A Comparative Study of Relationship between Micronutrients and Gestational Diabetes

In this paper, we studied the relation between the micronutrient and gestational diabetes. Therefore, we measured micronutrient concentration including Ni, Al, Cr, Mg, Fe, Zn, Cu, and Se in serum of women with gestational diabetes between 24 and 28 weeks of gestational age (study group) who had inclusion criteria and comparison with micronutrient levels in normal pregnant women with same gestational age (control group). Results showed that there was no significant difference between the serum micronutrient level (Ni, Al, Cr, Mg, Zn, Cu, Se) in study and control groups except serum level of iron which in serum of gestational diabetic women was lower than normal pregnant women and difference was significant.

Prepregnancy maternal body mass index and preterm delivery

OBJECTIVE

The purpose of this study was to determine the influence of maternal prepregnancy body mass index on preterm delivery (PTD), controlling for health and lifestyle variables.

STUDY DESIGN

Prospective data were from 83,544 pregnancies in the Norwegian Mother and Child Cohort Study. PTD was divided into early PTD (22 + 0 to 31 + 6 weeks' gestation) and late PTD (32 + 0 to 36 + 6 weeks' gestation).

RESULTS

The overall prevalence of PTD was 5.1%. Increased body mass index was associated with an increased risk of PTD; adjusted odds ratio (aOR) ranged from 1.11 (95% confidence interval [CI], 1.03-1.20) for preobesity to 2.00 (95% CI, 1.48-2.71) for grade-III obesity in the group that included all PTD subgroups. Grade-III obese women had an increased risk of both early and late PTD: aOR, 3.24 (95% CI, 1.71-6.14) and 1.81 (95% CI, 1.29-2.54), respectively.

CONCLUSION

Prepregnancy maternal overweight increases the risk of both early and late PTD.

Ancient Egyptian Women’s Health Care in Relation to Modern Women’s Health Care Practices: An Overview

This article will address ancient Egyptians’ knowledge of the childbirth cycle from preconception to postpartum and the similarities of these practices to modern knowledge and practice. From developing the first recorded pregnancy test to using the favorable position of squatting in labor, the ancient Egyptians exhibited a base of knowledge that more recent use of the scientific method has confirmed. Other practices, such as methods of contraception, can be seen as steps in the evolution of methods used today. Ancient Egyptians emphasized maternal nutrition during pregnancy and care of the newborn and mother immediately postpartum. Newborn assessment in ancient Egypt consisted of two parameters—cry and muscle tone—that exhibits a historical technique analogous to the modern Apgar score. Evidence also indicates that the ancient Egyptians devised strategies to suture perineal tears and manage other postpartum complications. In addition to practices related to pregnancy and childbirth, other contributions of these ancient people to medical practice and vocabulary were associated with general women’s health.

[Skeletal and extra-skeletal consequences of vitamin D deficiency]

Vitamin D is obtained from cutaneous production when 7-dehydrocholesterol is converted to vitamin D(3) (cholecalciferol) by ultraviolet B radiation or by oral intake of vitamin D. Rickets appeared to have been conquered with vitamin D intake, and many health care professionals thought the major health problems resulting from vitamin D deficiency had been resolved. However, rickets can be considered the tip of the vitamin D deficiency iceberg. In fact, vitamin D deficiency remains common in children and adults. An individual's vitamin D status is best evaluated by measuring the circulating 25-hydroxyvitamin D (25(OH)D3) concentration. There is increasing agreement that the optimal circulating 25(OH)D3 level should be approximately 30 ng/mL or above. Using this definition, it has been estimated that approximately three-quarters of all adults have low levels. In utero and during childhood, vitamin D deficiency can cause growth retardation and skeletal deformities and may increase the risk of hip fracture later in life. Vitamin D deficiency in adults can exacerbate osteopenia and osteoporosis, cause osteomalacia and muscle weakness, and increase the risk of fracture. More recently, associations between low vitamin D status and increased risk for various non-skeletal morbidities have been recognized; whether all of these associations are causally related to low vitamin D status remains to be determined. The discovery that most tissues and cells in the body have vitamin D receptors and that several possess the enzymatic machinery to convert the 25-hydroxyvitamin D3, to the active form, 1,25-dihydroxyvitamin D3, has provided new insights into the function of this vitamin. Of great interest is its role in decreasing the risk of many chronic illnesses, including common cancers, autoimmune diseases, infectious diseases, and cardiovascular disease. In this review I consider the nature of vitamin D deficiency, discuss its role in skeletal and non-skeletal health, and suggest strategies for prevention and treatment.

Practical advice for caring for women with eating disorders during the perinatal period

Pregnancy is a critical time for women struggling with disordered eating and weight concerns. For the majority of women with eating disorders, symptoms improve during pregnancy. Other women, particularly those with either subclinical or binge eating disorders, are at risk for an escalation of pathologic behaviors, putting both mother and fetus at risk for negative birth outcomes. Routinely screening for eating disorders will help identify those women who will most benefit from specialized care. Attention must be paid to possible harmful comorbid behaviors found in women with eating disorders, such as smoking, alcohol use, abusing laxatives or herbal supplements, and self-injurious behavior. This article reviews the mixed research findings of the impact of eating disorders upon pregnancy and identifies key times in prenatal care where nutritional counseling and specific interventions will increase the likelihood of positive pregnancy outcomes. The postpartum period is another critical time for provider intervention that may lower women's risks for eating disorder relapse, postpartum depression, and breastfeeding difficulties.