Describe the menstrual cycle? (all steps nd hormones involved in order) (5)

1. FSH grows follicles = produces estrogen = inhibits FSH (-) = prevents other follicles to grow = thickens endometrium lining 2. before ovulation estrogen causes pituitary to secrete LH and FSH again. LH causes follicle to rupture and release 2nd oocyte = ovulation 3. ruptured follicle = corpus luteum = secretes a lot of progesterone + little estrogen = thickens endo wall. P and E inhibit FSH and LH 4. corpus luteum degenerates (corpus albicans) = E + P levels drop = endo wall removed cycle repeats bec e+p are too low to inhibit FSH and LH