Nicole Banks1, Fangbai Sun2, Stephen A Krawetz3, R Matthew Coward4, Puneet Masson5, James F Smith6, J C Trussell7, Nanette Santoro8, Heping Zhang2, Anne Z Steiner9. 1. Department of Obstetrics and Gynecology, Virginia Commonwealth University Health, Richmond, Virginia. Electronic address: Nicole.Banks@vcuhealth.org. 2. Department of Biostatistics, Yale School of Public Health, New Haven, Connecticut. 3. Department of Obstetrics and Gynecology and Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan. 4. Department of Urology, University of North Carolina, Chapel Hill, North Carolina. 5. Department of Urology, University of Pennsylvania, Philadelphia, Pennsylvania. 6. Department of Urology, University of California, San Francisco, California. 7. Department of Urology, Upstate University Hospital, Syracuse, New York. 8. Department of Obstetrics and Gynecology, University of Colorado, Denver, Colorado. 9. Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina.
Abstract
OBJECTIVE: To determine the association between vitamin D levels in the male partner and fertility outcomes in couples with mild male factor infertility. DESIGN: Secondary analysis of a randomized, controlled trial. SETTING: Nine fertility centers in the United States. PATIENT(S): Men (n = 154) with sperm concentration between 5 and 15 million/mL, motility ≤40%, or normal morphology ≤4% were eligible. Female partners were ovulatory, ≤40 years old, and had documented tubal patency. INTERVENTION(S): Men provided semen and blood at baseline for semen analysis and 25-hydroxyvitamin D (25(OH)D) levels. They were randomly assigned to receive a vitamin formulation including vitamin D 2,000 IU daily or placebo for up to 6 months. Couples attempted to conceive naturally during the first 3 months and with clomiphene citrate with intrauterine insemination of the female partner in months 4 through 6. MAIN OUTCOME MEASURE(S): Primary: sperm concentration, motility, morphology, and DNA fragmentation at baseline. Secondary: cumulative pregnancy, miscarriage, and live birth rates. RESULT(S): Semen parameters and sperm DNA fragmentation were not statistically significantly different between men with vitamin D deficiency and men with 25(OH)D levels ≥20 ng/mL. In addition, clinical pregnancy and live birth rates were similar. Male 25(OH)D level <20 ng/mL was associated with a higher rate of pregnancy loss (adjusted odds ratio 9.0; 95% confidence interval 1.3 to 61.3). CONCLUSION(S): Vitamin D deficiency in the male partner did not significantly impact semen parameters or treatment outcomes. Further study is warranted to better characterize the rate of miscarriage in couples with male vitamin D deficiency.
OBJECTIVE: To determine the association between vitamin D levels in the male partner and fertility outcomes in couples with mild male factor infertility. DESIGN: Secondary analysis of a randomized, controlled trial. SETTING: Nine fertility centers in the United States. PATIENT(S): Men (n = 154) with sperm concentration between 5 and 15 million/mL, motility ≤40%, or normal morphology ≤4% were eligible. Female partners were ovulatory, ≤40 years old, and had documented tubal patency. INTERVENTION(S): Men provided semen and blood at baseline for semen analysis and 25-hydroxyvitamin D (25(OH)D) levels. They were randomly assigned to receive a vitamin formulation including vitamin D 2,000 IU daily or placebo for up to 6 months. Couples attempted to conceive naturally during the first 3 months and with clomiphene citrate with intrauterine insemination of the female partner in months 4 through 6. MAIN OUTCOME MEASURE(S): Primary: sperm concentration, motility, morphology, and DNA fragmentation at baseline. Secondary: cumulative pregnancy, miscarriage, and live birth rates. RESULT(S): Semen parameters and sperm DNA fragmentation were not statistically significantly different between men with vitamin D deficiency and men with 25(OH)D levels ≥20 ng/mL. In addition, clinical pregnancy and live birth rates were similar. Male 25(OH)D level <20 ng/mL was associated with a higher rate of pregnancy loss (adjusted odds ratio 9.0; 95% confidence interval 1.3 to 61.3). CONCLUSION(S): Vitamin D deficiency in the male partner did not significantly impact semen parameters or treatment outcomes. Further study is warranted to better characterize the rate of miscarriage in couples with male vitamin D deficiency.
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