Follicle-Stimulating Hormone (FSH) play a crucial role in the development of ovarian follicles in females.

As women approaches perimenopause, the number of small antral follicles recruited in each cycle decreases, leading to increased FSH levels.

Elevated FSH levels are commonly observed in menopause and certain conditions such as Premature Ovarian Failure, Premature Ovarian Aging, and Turner Syndrome. High FSH during reproductive years is abnormal and may indicate subfertility and/or infertility health. Therefore, a FSH test can provide valuable insights into fertility status and reproductive health.