FSH (Follicle Stimulating Hormone) is produced in the pituitary gland and plays a central role in fertility. In women, it stimulates the maturation of follicles in the ovaries, while in men, it supports the production of sperm in the testes.
Elevated FSH levels may indicate that the ovaries or testes are no longer functioning adequately, as is the case during menopause, for example. Low levels are more indicative of a disorder in the pituitary gland or the overarching hormonal system.