USMLE Step 2 CK Lecture Notes 2019: Obstetrics/Gynecology (Kaplan Test Prep)

OB TRIAD

Progesterone

The functions of progesterone are as follows:

Produced    by  corpus  luteum

Prepares    endometrium for implantation

Decreased   myometrial  contractility

In  early   pregnancy   it  induces endometrial secretory   changes favorable   for

blastocyst  implantation.

In  later   pregnancy   its function    is  to  induce  immune  tolerance   for the

pregnancy   and prevent myometrial  contractions.