Involution occurs because
A) FSH and LH levels rise
B) uterine contractions strengthened the myometrium
C) hCG levels fall
D) of a fall in circulating estrogen and progesterone
E) both (c) and (d)

Question

Quizplus · Accepted Answer

Involution occurs because of a fall in circulating estrogen and progesterone levels, which were maintaining the growth and development of the endometrium and myometrial cells during pregnancy. This leads to the structural and functional regression of the uterus to its pre-pregnancy state. FSH and LH levels may rise during the postpartum period, but they do not directly cause involution. Uterine contractions may help to expel the placenta and reduce bleeding, but they do not initiate involution. hCG levels fall after the placenta is delivered, but this also does not directly trigger involution. Therefore, the best answer is D.

Involution Occurs Because