Which hormone is primarily responsible for stimulating ovarian follicular growth?

Follicle-stimulating hormone (FSH) is primarily responsible for stimulating ovarian follicular growth. It is produced by the anterior pituitary gland and plays a crucial role in the female reproductive system. FSH promotes the development of ovarian follicles in the ovaries, which are essential for the maturation of eggs and for the production of hormones such as estrogen. The action of FSH facilitates the growth and maintenance of these follicles, leading to the selection of a dominant follicle that will eventually release an egg during ovulation.

In addition to its role in follicular development, FSH also interacts with other hormones in a complex regulatory system involving the menstrual cycle. The action of FSH is particularly vital during the early follicular phase when the follicles are subjected to its stimulating influence. As the follicles mature, they begin to produce estrogen, which, in turn, has feedback effects on FSH and luteinizing hormone (LH) secretion.

While luteinizing hormone plays a role later in the menstrual cycle, particularly in triggering ovulation, FSH is the key hormone responsible for initiating and sustaining the growth of ovarian follicles. Understanding the function of FSH is essential for comprehending female fertility, menstrual cycle regulation, and hormonal health.