Scientists find genetic key that triggers when a girl gets her first period
(NEWSER) - Genetics appear to play a key role in the timing of a girl’s first period, the BBC reports. Researchers have discovered two genes that influence the onset of puberty in both sexes, adjacent to genes controlling height and weight. The findings are important because early menstruation can contribute to a number of health problems for women, including heart disease, osteoporosis, and breast cancer. More»
