Fertility and sterility, 100(6), 1727-1734
To assess the association of total isoflavone intake with ovulatory function, including sporadic anovulation in healthy premenopausal women.
Prospective cohort study.
University. PATIENT(S): Participants included 259 healthy regularly menstruating women aged 18-44 years. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Serum concentrations of E2, free E2, P, LH, FSH, and SHBG and sporadic anovulation in healthy premenopausal women. RESULT(S): Isoflavone intake was not associated with E2, free E2, P, LH, and FSH concentrations. Consumption in the highest quartile (Q4: 1.6-78.8 mg/d) was significantly associated with greater SHBG concentrations (β = 0.09; 95% confidence interval [CI] 0.02-0.16), compared with the first quartile (Q1: 0.0-0.3 mg/d). CONCLUSION(S): Isoflavone intake was not associated with sporadic anovulation (Q4 vs. Q1: odds ratio 0.87, 95% CI 0.32-1.66). Dietary isoflavone intake among young premenopausal women was not related to sex hormone concentrations or anovulation, but was associated with minimally increased SHBG concentrations. These results suggest potential endocrine effects with no subsequent effects on ovulation, easing concerns regarding their impacts on fertility.
Filiberto AC, Mumford SL, Pollack AZ, Zhang C, Yeung EH, Schliep KC, Perkins NJ, Wactawski-Wende J, Schisterman EF (2013). Usual dietary isoflavone intake and reproductive function across the menstrual cycle. *Fertility and sterility*. https://doi.org/10.1016/j.fertnstert.2013.08.002
Filiberto A, Mumford SL, Pollack A, Zhang C, Yeung E, Schliep K, et al. Usual dietary isoflavone intake and reproductive function across the menstrual cycle. Fertil Steril. 2013;100(6):1727-1734. doi:10.1016/j.fertnstert.2013.08.002
Filiberto, Amanda, et al. "Usual dietary isoflavone intake and reproductive function across the menstrual cycle." *Fertility and sterility*, vol. 100, no. 6, 2013, pp. 1727-1734.