Page 676 - First Aid for the USMLE Step 1 2020, Thirtieth edition [MedicalBooksVN.com]_Neat

632 SectioN iii RepRoductive ` REPRODUCTIVE—PHySIOlOgy RepRoductive ` REPRODUCTIVE—PHySIOlOgy

Menstrual cycle Follicular phase can vary in length. Luteal phase is 14 days. Ovulation day + 14 days =
menstruation.
Follicular growth is fastest during 2nd week of the follicular phase.
Estrogen stimulates endometrial proliferation.
Progesterone maintains endometrium to support implantation.
 progesterone Ž  fertility.

PHASES OF OVARIAN CYCLE: FOLLICULAR PHASE LUTEAL PHASE

LH
FSH
Anterior
Hypothalamus GnRH pituitary LH FSH

Stimulates Ovulation

Primordial Developing Corpus Corpus
follicles follicle luteum albicans
Ovary

Produces

Produces Progesterone

Estrogen

Endometrium

PHASES OF UTERINE CYCLE: Menses Proliferative Secretory Menses
Ovulation

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