NR507 PATH FINAL EXAM STUDY GUIDE REPRODUCTIVE Endometrial cycle and occurrence of ovulation Manifestation of female reproductive functioning is menstrual bleeding, which starts with menarche (1st period) and ends with menopause (cessation of menstrual flow for 1 year). Average age of menarche is 12 with a range of 9-17. Appears to be r/t body weight, especially body fat ratio. At first cycles are anovulatory and vary from 10-60 days or >. Then in adulthood range form 25-35 days. Length varie...