 In Maine weather tonight, mainly clear with lows from 48 to 57. On Saturday, thickening clouds with rain arriving across the mountains and moving to the north in the evening. Highs from 67 to 78. This is Maine Public Radio. Deal. Because early menarche, someone's first menstrual period, can be a sign of future health issues. Joining me to help break this down is the study's lead author, Dr. Zifan Wang, postdoctoral research fellow at Harvard in Cambridge, Massachusetts.