By comparing the testosterone levels of five-month old pairs of twins, both identical and non-identical, University of Montreal researchers were able to establish that testosterone levels in infancy are not inherited genetically but rather determined by environmental factors.

To celebrate Mother’s Day, digital health pioneer MyMedLab.com, has created an infographic about the importance of knowing your personal hormone levels and encouraging mothers, daughters, and

A paper published today in Biology of Reproduction's Papers-in-Press describes the effects of brief prenatal exposure to plant estrogens on the mouse oviduct, modeling the effects of soy-based baby formula on human infants.

Girls who start puberty very early are more likely to have psychological problems and be at risk of sexual abuse and early pregnancy.

BOSTON, Feb. 20, 2012 /PRNewswire-USNewswire/ -- The first study to characterize a cohort of U.S.