Timing of first menstrual cycle may be predictor of cardiovascular disease risk in women

The timing of the first menstrual period is a predictor of weight gain and heart attack risk factors. The earlier a girl has her first period predicts greater weight gain. Other studies have also found an increased risk of breast cancer with early menstrual cycles. The early menstrual cycles appear to be linked with an increased exposure to hormones including estrogen mimicking hormones like phthalates and BPA
http://www.stonehearthnewsletters.com/timing-of-first-menstrual-cycle-may-be-predictor-of-cardiovascular-disease-risk-in-women/womens-health-menstruation/