Ovarian Menstrual Cycle

• Follicular Phase:1) GnRH - FSH, LH FSH: follicles ~ developLH: thecal cells ~ androgens (T) FSH: granulosa cells ~ aromatase (T to E2)2) Hi E2 - LH/FSH surge - ovulation 3) corpus luteum formed fr. ruptured follicle

• Luteal phase:C.L. ~ P4, E2 suppr. GnRH

• w/o pregnancy, C.L. degenerates, menses

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