Follicle-stimulating hormone (FSH) is released by the pituitary gland and stimulates growth of ovarian follicles in women and sperm production in men. In women, a raised early-cycle (day 2–3) FSH can suggest reduced ovarian reserve, though AMH and antral follicle count are now generally preferred as reserve markers. In men, FSH is checked alongside LH and testosterone when semen analysis is abnormal, particularly in azoospermia, to help distinguish a testicular problem from an obstruction or a pituitary/hypothalamic cause. FSH is also given as an injectable medicine during ovarian stimulation for IUI or IVF, under clinical supervision.
Also known as: follicle stimulating hormone, day 3 FSH, day 2 FSH
Related India guides
Sources
- Indian Council of Medical Research (icmr.gov.in)
- Federation of Obstetric and Gynaecological Societies of India (fogsi.org)
Last reviewed: 9 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.