Question

Increased vasculation of the endometrium occurs

A. after ovulation.
B. during the proliferative phase
C. during the secretory phase
D. only if fertilization occurs

Answer 1

B. During the proliferative phase

Step-by-step explanation:

The endometrial vasculature appears during the proliferative phase, in which the endometrium grows in size and blood vessels and glands are formed.