Are Caucasian-European men delaying fatherhood? Results of a 7 year observational study of infertile couples with male factor infertility

The Effect of Varicocele Treatment on Fertility in Adults: A Systematic Review and Meta-analysis of Published Prospective Trials

CONTEXT

The benefits and harms of varicocele treatment versus observation in adult infertile males are still controversial.

OBJECTIVE

To systematically pool the evidence on outcomes of varicocele treatment (any surgical or radiological) versus observation in adult infertile men.

EVIDENCE ACQUISITION

A systematic review and meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement. Only prospective randomized and nonrandomized studies were included until November 2021. The primary outcome was pregnancy rate; the secondary outcomes were improvements in sperm concentration, normal morphology, and progressive sperm motility after treatment compared to baseline. Men ≥18 yr of age with any-grade varicoceles were included.

EVIDENCE SYNTHESIS

Of 557 articles identified, 12 were eligible for inclusion, involving 1357 patients. Varicoceles were treated surgically in ten and radiologically in four studies. Varicocele treatment improved pregnancy rates (odds ratio 1.29; 95% confidence interval [CI] 1.00-1.65; p = 0.048) and sperm concentration (mean difference 12.34 million/ml, 95% CI 3.49-21.18; p = 0.006) compared with observation. Proportions of spermatozoa with normal morphology and progressive motility were not statistically different from those with observation. However, considering treatment arm only, sperm concentration, progressive motility, and normal sperm morphology were improved compared with baseline. A subgroup analysis showed that the benefit of varicocele treatment is evident in men with an abnormal semen analysis. The main limitation is represented by the heterogeneity of the included studies, mostly in terms of study population, fertility of the partner, outcome evaluation, lack of long-term outcomes, and intermediate/high risk of bias.

CONCLUSIONS

Treatment of any-grade varicoceles may improve pregnancy rates and sperm concentration in adult infertile men, while benefits in sperm motility and normal morphology are less clear.

PATIENT SUMMARY

In this systematic review and meta-analysis of all published prospective trials on varicocele treatment, significant evidence emerged on its benefit in terms of improved pregnancy rates and sperm concentration, while benefits in sperm motility and morphology are less clear.

Fertility preservation for patients with melanoma

The advent of immunotherapy and targeted therapy has outstandingly improved the prognosis in subjects with melanoma. Their use is now advocated also in earlier stages as an adjuvant therapy, and some neoadjuvant clinical trials are ongoing. Consequently, survivors free of disease are increasing, as well as those exposed to these new agents. Parenthood in survivors is, therefore, receiving growing interest. Evidence on the effects of immunotherapy and targeted therapy on future fertility is limited, but not entirely reassuring, in particular for immunotherapy. The necessity of delaying pregnancy seeking up to the end of treatments and follow-up (iatrogenic aging) is an additional albeit neglected source of concern, in particular for women in their late 30s. Subjects with melanoma should be informed on the multifaceted issue of future fertility at the time of cancer diagnosis. Available options of fertility preservations, including sperm and oocytes storage, should also be discussed, especially considering that at the age 0-39, melanoma represents the second most frequent neoplasia. In the decision-making process, most attention should be given to sex, age, and exposure to immunotherapy.

The impact of different WHO reference criteria for semen analysis in clinical practice: who will benefit from the new 2021 thresholds for normal semen parameters?

Background

In 2021, the World Health Organization (WHO) has provided the latest update on processing and evaluating semen analysis.

Objectives

To assess (i) the rate of discordance in semen parameters categorization across three different WHO reference values (namely WHO21, 2010 and 1999) and (ii) the clinical differences among discordant semen analyses from a cohort of primary infertile men.

Materials and methods

Data from 788 infertile men were analyzed. Semen parameters were interpreted based on WHO21, WHO10, and WHO99 reference criteria. Pregnancy outcomes with assisted reproductive techniques (ART) were available for 110 (14%) patients. Descriptive statistics was applied to describe potential differences among the three consecutive WHO references criteria.

Results

Semen parameters categorizations were highly different across the three groups (p < 0.001). Of all, 271 (42.2%) patients had normal semen parameters according to WHO10 but were pathologic when considered with WHO21 reference criteria (namely, men with increased semen abnormalities). Infertile men with increased semen abnormalities had lower testicular volume (p < 0.001) but higher FSH (p < 0.01) and LH (p < 0.001) values than those who had no change in terms of semen parameters categorization. Negative ART outcomes were more frequently reported in men with worsening semen parameters compared with those with confirmed semen parameters at WHO21 versus WHO10 (26.8% vs. 49%, p = 0.03). Conversely, infertile men with worsening semen parameters at WHO21 versus WHO99 were similar in terms of clinical and hormonal characteristics compared with those with the same rate of semen abnormalities.

Conclusions

One out of three infertile men showed worsened semen categorization according to WHO21 versus WHO10. Infertile men with worsening of semen parameters had worse clinical and hormonal characteristics than those with confirmed numbers of semen abnormalities. Moreover, live birth rates were lower in men with worsening semen abnormalities as for WHO21.

Risk of health status worsening in primary infertile men: a prospective 10-year follow-up study

BACKGROUND

A severe male infertility factor has been associated with both lower health status and increased mortality in infertile men.

OBJECTIVES

To investigate reproductive factors associated with health status impairment in infertile men over a 10-year time frame since first clinical evaluation.

MATERIALS AND METHODS

Data from 899 infertile men were analysed at baseline between 2003 and 2010. Health-significant comorbidities were scored with the Charlson Comorbidity Index (CCI). Patients were followed-up yearly recording any worsening in their health status until 2019. Cox regression models were used to estimate hazard ratios (HR) and 95% confidence intervals (CI) of CCI score increase.

RESULTS

At a median follow-up of 136 months (IQR 121, 156), 85 men (9.5%) depicted an increase of their baseline CCI score of at least 1 point. The most frequent reason for CCI upgrade was cancer (34%), cardio-vascular diseases (29%) and diabetes mellitus (22%). Compared to patients without a CCI increase, patients with a CCI increase presented with higher BMI and FSH values, a higher rate of baseline CCI ≥ 1 (all p < 0.01) and a greater proportion of non-obstructive azoospermia (p < 0.001). In the Cox regression model, patient's BMI (p < 0.001), baseline CCI ≥ 1 (p < 0.01) and azoospermia status (p = 0.001) were found to be independently associated with CCI increases.

CONCLUSIONS

Almost 10% of men presenting for primary infertility had a decrease of the overall health status already in the relatively short 10-year time frame after first presentation. Non-obstructive azoospermic men showed the worst health status impairment and should be strictly followed-up regardless of their fertility status. This article is protected by copyright. All rights reserved.

Infertile couples still undergo assisted reproductive treatments without initial andrological evaluation in the real-life setting: A failure to adhere to guidelines?

BACKGROUND

The EAU Guidelines on Male Sexual and Reproductive Health state that both partners of the infertile couple should undergo simultaneous investigation.

OBJECTIVES

To assess the prevalence and the characteristics of infertile men who were referred for an andrological evaluation after failed attempts of Assisted Reproductive Technology (ART) with those who were evaluated at the beginning of their infertility pathway at a single academic centre over a 17-year period.

MATERIALS AND METHODS

Data of 3213 primary infertile couples assessed between 2003 and 2020 were analysed. Descriptive statistics compared the overall characteristics of male partners of couples with (+ART) or without (-ART) previous ART prior to andrological consultation. Logistic regression models analysed variables associated with +ART. Local polynomial regression models explored the probability of +ART over the analysed time frame.

RESULTS

Of all, 493 (15.3%) participants were +ART. Patients and female partners' age were higher in +ART couples (all p≤0.04). Sperm concentration, progressive sperm motility and normal sperm morphology were lower in +ART than in -ART patients (all p<0.001), along with a greater percentage of non-obstructive azoospermia in +ART compared to -ART men (p<0.0001). At univariable analysis, patient age and partner age >35 years and a less recent assessment were associated with +ART status (all p≤0.04). Male age and less recent years of assessment were also independent predictors of +ART, after accounting for partner's age >35 years (all p<0.01). A not significant decrease of this pattern was observed throughout the last 7 years at local polynomial regression models.

DISCUSSION

Overall awareness towards the importance of a comprehensive evaluation for the male partner of every infertile couple should therefore be further strengthened.

CONCLUSIONS

Approximately 15% of couples still undergo ART without any initial andrological evaluation in the real-life setting. A not significant decrease in this trend was observed over most recent years. This article is protected by copyright. All rights reserved.

Male factor infertility trends throughout the last 10 years: Report from a tertiary-referral academic andrology centre

BACKGROUND

Trends of male factor causes of couples' infertility over time have been poorly investigated.

OBJECTIVE

We investigated trends in the causes of pure male factor infertility (MFI) throughout the last 10 years in a tertiary-referral academic andrology center.

MATERIAL AND METHODS

Baseline characteristics at first presentation from a cohort of 1647 consecutive male factor infertility patients belonging to primary infertile couples between 2008 and 2018 have been comprehensively collected over time. Seven major causes of male factor infertility were identified: varicocoele; history of cryptorchidism; hypogonadism (primary and secondary); obstructive azoospermia; genetic abnormalities; other causes (large group including the remnant conditions of known causes); and idiopathic infertility. Rates of different male factor infertility causes over the study period were analyzed. Multivariable logistic regression models tested the likelihood of male factor infertility causes over time. Estimated trends were explored graphically.

RESULTS

Of all, varicocoele was found in 615 (37.3%), cryptorchidism in 124 (7.5%), genetic abnormalities in 61 (3.7%), hypogonadism in 165 (10%), obstructive conditions in 55 (3.3%), other causes in 129 (7.8%) patients, and idiopathic infertility in 498 (30.3%) patients, respectively. Over time, a reduction in the proportions of cryptorchidism and varicocoele (all P < 0.001) cases was observed, along with an increase in the proportions of hypogonadism, other causes of MFI and idiopathic cases (all P ≤ 0.01). Rates of genetic and obstructive cases remained stable. The observed trends were confirmed at logistic regression models.

DISCUSSION AND CONCLUSIONS

A decreasing trend in the proportions of varicocoele and cryptorchidism at first presentation was observed over the last 10 years; conversely, the proportions of idiopathic cases, hypogonadal patients, and infertile men presenting with other male factor infertility causes significantly increased over the same time frame at a single tertiary-referral academic andrology center.

Normal sperm parameters per se do not reliably account for fertility: A case-control study in the real-life setting

A proportion of men are infertile despite having normal medical history/physical examination and normal semen analysis. We aimed to assess whether normal sperm parameters per se account for male factor fertility. 1,957 infertile men were compared with 103 age-comparable fertile controls. Semen analysis was based on 2010 World Health Organization reference criteria. Of all, 12.1% of infertile men and 40.8% of fertile men presented with normal sperm parameters. Among fertile men, 36.9% had isolated sperm abnormalities and 22.3% men showed two or more concomitant sperm abnormalities. Serum total testosterone was higher in infertile men with normal sperm parameters compared to those with ≥2 sperm abnormalities or azoospermia, but similar to those with isolated sperm abnormalities (p ≤ .001). Circulating hormones were similar among sperm parameters groups in fertile men. At multivariable analyses, testicular volume (OR 1.12, p ≤ .001) and FSH (OR 0.8, p ≤ .001) were associated with normal sperm parameters. Overall, the longer the infertility period, the greater the number of sperm parameters abnormalities (p < .01). In conclusion, we found that 12% of infertile men and only 41% of fertile men present with normal sperm parameters. Normal sperm parameters per se do not reliably account for fertility in the real-life setting.

Infertile Men Have Higher Prostate-specific Antigen Values than Fertile Individuals of Comparable Age

BACKGROUND

Infertile men are at greater risk for oncological and nononcological chronic disease than fertile individuals.

OBJECTIVE

To investigate prostate-specific antigen (PSA) values in men presenting for primary couple's infertility compared with a cohort of fertile individuals, according to the recommendation of the European Association of Urology guidelines that a first PSA assessment should be done at 40-45 yr of age.

DESIGN, SETTING, AND PARTICIPANTS

This is a cross-sectional study. Data from 956 (90%) infertile men and 102 (9.6%) fertile participants were analysed. Circulating hormones, total PSA, and semen parameters were investigated in every man.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

Descriptive statistics, local polynomial smoothing, and linear regression models were used to test potential associations with PSA levels.

RESULTS AND LIMITATIONS

Overall, PSA >1 ng/ml was found in 318 (30%) men. Serum PSA was higher (p = 0.02), while serum testosterone (p < 0.01) was lower in infertile than in fertile men. In participants younger than 40 yr, 176 (27%) men had PSA >1 ng/ml; of them, a greater proportion were infertile (28% infertile vs 17% fertile, p = 0.03). At multivariable linear regression analysis, infertile status (coefficient 0.21; 95% confidence interval 0.02-0.39) was associated with higher PSA values, after adjusting for age and serum testosterone level. This was a single-centre study, raising the possibility of selection biases.

CONCLUSIONS

Infertile men have higher PSA values than fertile individuals. Of all, almost one out of three primary infertile men younger than 40 yr has a first total PSA value of >1 ng/ml.

PATIENT SUMMARY

In this study, we observed that (1) infertile men have higher prostate-specific antigen (PSA) values than fertile individuals and (2) a greater proportion of infertile men younger than 40 yr had total PSA >1 ng/ml at the first assessment. These data might be relevant to study the potential clinical impact of more rigorous screening in primary infertile men.

Metabolic syndrome in White-European men presenting for secondary couple's infertility: an investigation of the clinical and reproductive burden

We aimed to determine the impact of metabolic syndrome (MetS) on reproductive function in men with secondary infertility, a condition that has received relatively little attention from researchers. Complete demographic, clinical, and laboratory data from 167 consecutive secondary infertile men were analyzed. Health-significant comorbidities were scored with the Charlson Comorbidity Index (CCI; categorised 0 vs 1 vs 2 or higher). NCEP-ATP III criteria were used to define MetS. Semen analysis values were assessed based on the 2010 World Health Organization (WHO) reference criteria. Descriptive statistics and logistic regression models tested the association between semen parameters and clinical characteristics and MetS. MetS was found in 20 (12%) of 167 men. Patients with MetS were older (P < 0.001) and had a greater BMI (P < 0.001) compared with those without MetS. MetS patients had lower levels of total testosterone (P = 0.001), sex hormone-binding globulin, inhibin B, and anti-Mόllerian hormone (all P ≤ 0.03), and they were hypogonadal at a higher prevalence (P = 0.01) than patients without MetS. Moreover, MetS patients presented lower values of semen volume, sperm concentration, and sperm normal morphology (all P ≤ 0.03). At multivariate logistic regression analysis, no parameters predicted sperm concentration, normal sperm morphology, and total progressive motility. Our data show that almost 1 of 8 White-European men presenting for secondary couple's infertility is diagnosed with MetS. MetS was found to be associated with a higher prevalence of hypogonadism, decreased semen volume, decreased sperm concentration, and normal morphology in a specific cohort of White-European men.

Validation of the American Society for Reproductive Medicine guidelines/recommendations in white European men presenting for couple's infertility

OBJECTIVE

To retrospectively validate the American Society for Reproductive Medicine (ASRM) guidelines/recommendations concerning endocrine evaluation in a cohort of white European men presenting for couple's infertility.

DESIGN

Retrospective study.

SETTING

Academic reproductive medicine outpatient clinic.

PATIENT(S)

Cohort of 1,056 consecutive infertile men (noninterracial infertile couples).

INTERVENTION(S)

Testicular volume was assessed with a Prader orchidometer. Serum hormones were measured (8-10 a.m.) in all cases. Hypogonadism was defined as total T < 3 ng/mL, according to the Endocrine Society definition. Semen analysis values were assessed based on the 2010 World Health Organisation reference criteria.

MAIN OUTCOME MEASURE(S)

ASRM indications for endocrine assessment in infertile men (sperm concentration <10 million/mL, impaired sexual function, and other clinical findings suggesting a specific endocrinopathy) were used to predict hypogonadism in our cohort. Moreover, a clinically user-friendly three-item nomogram was developed to predict hypogonadism and was compared to the ASRM guidelines assessment.

RESULT(S)

Biochemical hypogonadism was diagnosed in 156 (14.8%) men. Overall, 669 (63.4%) patients would have necessitated total T assessment according to the ASRM criteria; of these, only 119 (17.8%) were actually hypogonadal according to the Endocrine Society classification criteria. Conversely, 37 (23.7%) out of 156 patients with biochemical hypogonadism would have been overlooked. The overall predictive accuracy, sensitivity, and specificity of the ASRM guidelines was 58%, 76%, and 39%, respectively. Our nomogram was not reliable enough to predict hypogonadism, despite demonstrating a significantly higher predictive accuracy (68%) than the ASRM guidelines.

CONCLUSION(S)

The current findings show that the ASRM guidelines/recommendations for male infertility workup may not be suitable for application in white European infertile men.

Metabolic syndrome in white European men presenting for primary couple's infertility: investigation of the clinical and reproductive burden

Despite complex interactions between obesity, dyslipidemia, hyperinsulinaemia, and the reproductive axis, the impact of metabolic syndrome on human male reproductive function has not been analysed comprehensively. Complete demographic, clinical, and laboratory data from 1337 consecutive primary infertile men were analysed. Health-significant comorbidities were scored with the Charlson Comorbidity Index (categorised 0 vs. 1 vs. 2 or higher). NCEP-ATPIII criteria were used to define metabolic syndrome. Semen analysis values were assessed based on the 2010 World Health Organisation (WHO) reference criteria. Descriptive statistics and logistic regression models tested the association between semen parameters and clinical characteristics and metabolic syndrome. Metabolic syndrome was found in 128 (9.6%) of 1337 men. Patients with metabolic syndrome were older (p < 0.001) and had a greater Charlson Comorbidity Index of 1 or higher (chi-square: 15.6; p < 0.001) compared with those without metabolic syndrome. Metabolic syndrome patients had lower levels of total testosterone (p < 0.001), sex hormone-binding globulin (p = 0.004), inhibin B (p = 0.03), and anti-Müllerian hormone (p = 0.009), and they were hypogonadal at a higher rate (chi-square: 32.0; p < 0.001) than patients without metabolic syndrome. Conversely, the two groups did not differ significantly in further hormonal levels, semen parameters, and rate of either obstructive or non-obstructive azoospermia. At multivariate logistic regression analysis, testicular volume (OR: 0.90; p = 0.002) achieved independent predictor status for WHO pathological semen concentration; conversely, age, Charlson Comorbidity Index scores, metabolic syndrome, and inhibin B values did not. No parameters predicted normal sperm morphology and total progressive motility. Metabolic syndrome accounts for roughly 9% of men presenting for primary couple's infertility. Although metabolic syndrome patients have a lower general male health status, semen analysis values seem independent of the presence of metabolic syndrome.

Young Men With Cancer Experience Low Referral Rates for Fertility Counseling and Sperm Banking

PURPOSE

With improved cancer survival rates and the current trend of delaying parenthood, fertility is a growing issue among cancer patients. The purpose of this study was to evaluate the incidence of fertility counseling and sperm banking in reproductive-age male cancer patients and to assess factors that influence counseling and banking.

MATERIALS AND METHODS

Male patients ages 13 to 50 years who received a new cancer diagnosis from January 1, 2013, to May 1, 2015, and planned to initiate curative chemotherapy at our center were identified. Documentation of fertility counseling and sperm cryopreservation was abstracted from the medical record. Univariable and multivariable logistic regression modeling was used to examine variables associated with fertility counseling and sperm banking.

RESULTS

Of 201 patients who fit the study criteria, 59 (29%) received fertility counseling and 23 (11%) attempted sperm banking. All patients who banked sperm had documentation of fertility counseling. Younger patients were significantly more likely to be counseled, with mean ages of 27.4 and 40.4 years for counseled and noncounseled patients, respectively (P < .001). Among counseled patients, those with a lower median income (P = .038) or who had Medicaid or no insurance (P = .042) were less likely to bank sperm. In a multivariable logistic regression model, older age (5-year odds ratio, 0.61; P < .001) and presence of comorbidities (odds ratio, 0.15; P = .03) remained significantly associated with a lower counseling rate.

CONCLUSION

There is a low rate of fertility counseling and referral for sperm banking in young men with cancer receiving chemotherapy. Further work is needed to develop interventions to improve fertility counseling rates and opportunities for sperm banking.

Male fertility is reduced by chronic intermittent hypoxia mimicking sleep apnea in mice

STUDY OBJECTIVES

Obstructive sleep apnea (OSA) is characterized by intermittent hypoxia and oxidative stress. However, it is unknown whether intermittent hypoxia mimicking OSA modifies male fertility. We tested the hypothesis that male fertility is reduced by chronic intermittent hypoxia mimicking OSA in a mouse model.

DESIGN

Case-control comparison in a murine model.

SETTING

University research laboratory.

PARTICIPANTS

Eighteen F1 (C57BL/6xCBA) male mice.

INTERVENTIONS

Mice were subjected to a pattern of periodic hypoxia (20 sec at 5% O2 followed by 40 sec of room air) 6 h/day for 60 days or normoxia. After this period, mice performed a mating trial to determine effective fertility by assessing the number of pregnant females and fetuses.

MEASUREMENTS AND RESULTS

After euthanasia, oxidative stress in testes was assessed by measuring the expression of glutathione peroxidase 1 (Gpx1) and superoxide dismutase-1 (Sod1) by reverse-transcription polymerase chain reaction. Sperm motility was determined by Integrated Semen Analysis System (ISAS). Intermittent hypoxia significantly increased testicular oxidative stress, showing a reduction in the expression of Gpx1 and Sod1 by 38.9% and 34.4%, respectively, as compared with normoxia (P < 0.05). Progressive sperm motility was significantly reduced from 27.0 ± 6.4% in normoxia to 12.8 ± 1.8% in the intermittent hypoxia group (P = 0.04). The proportion of pregnant females and number of fetuses per mating was significantly lower in the intermittent hypoxia group (0.33 ± 0.10 and 2.45 ± 0.73, respectively) than in normoxic controls (0.72 ± 0.16 and 5.80 ± 1.24, respectively).

CONCLUSIONS

These results suggest that the intermittent hypoxia associated with obstructive sleep apnea (OSA) could induce fertility reduction in male patients with this sleep breathing disorder.