What is the role of follicle-stimulating hormone (FSH) in the menstrual cycle?

• A. It triggers menstrual shedding
• B. It stimulates egg maturation
• C. It inhibits hormone production
• D. It promotes ovulation

Answer: (B)

Follicle-stimulating hormone (FSH) plays a crucial role in the menstrual cycle, particularly in the first half of the cycle, known as the follicular phase. Its primary function is to stimulate the growth and maturation of ovarian follicles, which are tiny sacs in the ovaries that contain immature eggs. As FSH levels rise, it encourages these follicles to develop and produce estrogen.

The maturation of eggs is essential for the reproductive process, as it prepares an egg for potential fertilization. In addition, the increased levels of estrogen produced by the maturing follicles contribute to further changes in the menstrual cycle, including the thickening of the endometrium (the uterine lining) in preparation for a possible pregnancy.

In contrast, the other options pertain to different physiological processes. Triggering menstrual shedding relates to the luteal phase, where the drop in hormones signals menstruation. Promoting ovulation is primarily the role of luteinizing hormone (LH), which surges to trigger the release of a mature egg from the ovary. Inhibiting hormone production does not describe the role of FSH in the menstrual cycle; rather, FSH actively stimulates processes rather than inhibiting them.