FSH (Follicle Stimulating Hormone) is a blood test that measures the level of FSH, a hormone produced by the pituitary gland that regulates reproductive function. In females, it supports follicle development and ovulation, while in males it contributes to sperm production. The test is needed to evaluate fertility, menstrual irregularities, delayed or early puberty, ovarian or testicular function, and certain hormonal disorders.
It may be used to evaluate fertility, menstrual irregularities, ovarian or testicular function, delayed or early puberty, and certain reproductive or pituitary disorders.
FSH stimulates the growth and development of ovarian follicles and plays an important role in regulating the menstrual cycle and supporting ovulation.
FSH acts on the testes and supports the production and development of sperm cells. It is an important part of male reproductive hormone regulation.
High FSH may occur when the ovaries or testes are producing fewer sex hormones or responding less effectively to pituitary signals. Interpretation depends on age, sex, and clinical context.
Low FSH can occur with certain pituitary or hypothalamic disorders and may affect reproductive function. It must be interpreted alongside other hormones and clinical findings.