What does progesterone do?

What does progesterone do?

• A. Leads to the organization of the endometrial glands
• B. Triggers ovulation
• C. Increases cervical mucus stringiness
• D. Stimulates GnRH release

Answer: (A)

Progesterone’s key action after ovulation is to transform the lining of the uterus into a secretory state that can support a potential embryo. This involves organizing and maturing the endometrial glands so they secrete nutrients and create a receptive environment for implantation. That’s why the best choice describes the organization of the endometrial glands. It doesn’t trigger ovulation—ovulation is driven by the LH surge under estrogen’s positive feedback. Progesterone actually provides negative feedback on GnRH, reducing its release. Regarding cervical mucus, progesterone tends to thicken and make it less permeable to sperm, rather than increasing mucus stringiness.

Progesterone’s key action after ovulation is to transform the lining of the uterus into a secretory state that can support a potential embryo. This involves organizing and maturing the endometrial glands so they secrete nutrients and create a receptive environment for implantation. That’s why the best choice describes the organization of the endometrial glands.

It doesn’t trigger ovulation—ovulation is driven by the LH surge under estrogen’s positive feedback. Progesterone actually provides negative feedback on GnRH, reducing its release. Regarding cervical mucus, progesterone tends to thicken and make it less permeable to sperm, rather than increasing mucus stringiness.