Menarche occurred at 13 years of age and the menstrual cycle remained within normal limits until the onset of menorrhagi月经于13岁开始，一直到发生月经过多症以前，经期正常。
When areolar unit reached its critical value(7.00cm~), menarche appeared in 8 .% of girls.乳晕单位达“临界值”(7.00cm~)时,8 ％女子初潮发生。