FSH levels are typically reported in units such as international units per liter (IU/L) or milli-international units per milliliter (mIU/mL). In females, FSH plays a crucial role in the development and maturation of ovarian follicles and the release of eggs during the menstrual cycle. In males, FSH stimulates the production of sperm in the testes.

Measuring FSH levels can be helpful in assessing fertility, monitoring the menstrual cycle, and diagnosing certain reproductive disorders. FSH testing is commonly used in conjunction with other hormone tests, such as luteinizing hormone (LH), to evaluate the functioning of the reproductive system.