Question

Which of the following combinations is most likely to be present before ovulation occurs?

Options

• FSH, corpus luteum, estrogen, secretory uterine lining

• Luteinizing hormone (LH), follicle, progesterone, thick uterine lining

• FSH, follicle, estrogen, uterine lining becoming thick

• LH, corpus luteum, progesterone, secretory uterine lining

Answer 1

FSH, follicle, estrogen, uterine lining becoming thick

Explanation:

• Before ovulation, FSH stimulates the development of the ovarian follicle, which secretes estrogen. Increasing estrogen levels cause the uterine lining to thicken (proliferative phase).
• LH surge then triggers ovulation. The corpus luteum and progesterone dominate after ovulation, preparing the secretory uterine lining.
• Hence, the combination before ovulation involves FSH, follicle, estrogen, and thickening uterine lining, not corpus luteum or high progesterone which come later.