: Follicle-Stimulating Hormone, Serum, Pre-Triple Bolus, Random

: What FSH Does

: FSH is produced by the pituitary gland, a small gland at the base of the brain. In women it helps stimulate the growth of ovarian follicles and egg development, and in men it supports sperm production. FSH also signals the reproductive organs to make other hormones such as estrogen or testosterone.

: Why the Test Is Ordered

: Doctors order an FSH test to investigate fertility concerns, irregular or absent menstrual periods, early or delayed puberty, or symptoms of pituitary problems. It may also be used to monitor hormone therapy or to help interpret other hormone results.

: How the Sample Is Collected

: A small blood sample is drawn from a vein, usually in your arm, into a tube that yields serum for testing. The timing of the sample can matter—your provider may ask you to have it drawn at a particular point in your menstrual cycle or at a set time of day. Follow any fasting or timing instructions you are given.

: What the Results Mean

: Your FSH level is interpreted together with your age, sex, symptoms, and other hormone tests. Results outside the expected range can point to issues with the pituitary gland or the ovaries or testes, but they do not diagnose a condition on their own. Your healthcare provider will explain what your result means in your specific situation.