BIO 116 OBGYN EOR 5 A SCORE

GTPAL o Gravida o Term o Preterm o Abortion o Living Normal Physiology  Phase 1 – Follicular phase [proliferative phase] Days 1-14 o ESTROGEN predominates  Endometrium thickens = proliferation  GnRH   FSH & LH o Ovaries   FSH = follicle stimulating hormone  follicle & egg maturation   LH = stimulates follicle to produce estrogen o ESTROGEN Causes NEGATIVE FEEDBACK to HPO system Stops new follicles from maturing  OVULATION Days 12-14 o Switch from negative  positive feedback =  estrogen, FSH & LH o LH surge causes ovulation = egg release  Ruptured follicle becomes corpus luteum  Phase 2 – Luteal Phase [secretory phase] Days 14-28 o PROGESTERONE predominant  LH surge causes ruptured follicle to become corpus luteum  Corpus luteum secretes progesterone & estrogen to main endometrial lining  Negative feedback again o EGG FERTILIZED = pregnancy