NR 507 final exam WEEK 8 STUDY GUIDE- QUESTIONS AND ANSWERS

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 varies considerably. Cycle and regular ovulation are dependent on  The activity of gonadostat  Initial pituitary secretion of gonadotropin FSH  Estrogen positive feedback for the preovulatory FSH and LH surge, oocyte maturation, and corpus luteum formation and production of progesterone. The average menstrual cycle lasts 27 to 30 days and consists of three phases, which are named for ovarian and endometrial changes: the follicular/proliferative phase, the luteal/secretory phase, and the ischemic/menstrual phase.