Question

What does progesterone make the endometrium during the secretory phase?

Options

• Thin and fragile

• Degenerated and shedding

• Proliferative and expanding

• Vascular, thick, and glandular

Answer 1

Progesterone makes the endometrium highly vascular, thick, and glandular during the secretory phase. These changes prepare the uterus for implantation and support of a potential embryo.