Dose-Response Relationships Between Gonadal Steroids and Bone, Body Composition, and Sexual Function in Aging Men.

Context: Most labs set the lower limit of normal for testosterone at the 2.5th percentile of values in young or age-matched men, an approach that does not consider the physiologic changes associated with various testosterone concentrations.

Objective: To characterize the dose-response relationships between gonadal steroid concentrations and measures regulated by gonadal steroids in older men.

Antimullerian Hormone and Impending Menopause in Late Reproductive Age: The Study of Women's Health Across the Nation.

Background: A test that helps predict the time to the final menstrual period (FMP) has been sought for many years.

Objective: To assess the ability of antimullerian hormone (AMH) measurements to predictions the time to FMP.

Design: Prospective longitudinal cohort study.