What is the primary hormone produced by the corpus luteum after ovulation?

• A. Progesterone
• B. Estrogen
• C. Follicle-stimulating hormone
• D. Luteinizing hormone

Answer: (A)

The primary hormone produced by the corpus luteum after ovulation is progesterone. Following ovulation, the ruptured follicle transforms into the corpus luteum, which is responsible for the production of progesterone. This hormone plays a crucial role in preparing the endometrium for a potential implantation of a fertilized egg, thereby supporting early pregnancy. In addition to progesterone, the corpus luteum also secretes some estrogen; however, progesterone is the predominant hormone during this phase of the menstrual cycle, which is essential for maintaining the uterine lining and preventing menstruation if fertilization occurs.

Estrogen is also involved in the menstrual cycle and is produced in larger quantities by the developing follicles before ovulation. Follicle-stimulating hormone and luteinizing hormone are key players in the regulation of ovulation and follicular development but are not produced by the corpus luteum. Instead, they are secreted by the anterior pituitary gland and play roles in stimulating ovarian activity rather than being products of the corpus luteum itself.