As the period of fetal growth comes to an end, a steep rise in ____ levels directly causes ____.
A) progesterone; uterine cells to express oxytocin receptor genes
B) progesterone; uterine contractions
C) estrogen; uterine cells to express oxytocin receptor genes
D) estrogen; uterine contractions
E) estrogen; oxytocin production

Question

Quizplus · Accepted Answer

Estrogen levels rise steeply towards the end of pregnancy, which directly causes uterine cells to express oxytocin receptor genes, preparing the uterus for labor by making it more sensitive to oxytocin.

As the Period of Fetal Growth Comes to an End