Objective
To characterize normative anti-Müllerian hormone (AMH) levels and ascertain which factors are associated with AMH in a large cohort of reproductive-aged women.
Design
Cross-sectional study.
Setting
Study of the Environment, Lifestyle and Fibroids (SELF), a longitudinal study performed by the National Institute of Environmental Health Sciences in conjunction with a major health care provider in Detroit, Michigan.
Patients
1,654 African-American women (AAW) aged 23-34 at recruitment.
Intervention
None
Main Outcome Measure
Serum AMH measured using an ultrasensitive ELISA.
Results
The median AMH was 3.18 ng/ml, and there was a significant, but nonlinear, relationship between age and AMH, with levels peaking at age 25. As AMH was not normally distributed, log transformation was performed and used for all analyses. In a multivariable age-adjusted model, body mass index, current use of hormonal contraception, and history of a thyroid condition were inversely associated with AMH, while history of abnormal menstrual bleeding and menstrual cycles longer than 35 days were positively associated with AMH.
Conclusions
While age is correlated with AMH, it accounts for only a portion of the variation seen. This study adds valuable information to the existing literature on normative AMH levels in young reproductive-aged women. While our findings fill a critical data gap for ovarian reserve in AAW, the insights gained will be of benefit for all women.