The FSH test measures how much FSH (follicle-stimulating hormone) is present in the blood.
The pituitary gland is responsible for producing FSH and releasing it into your bloodstream. This test is commonly ordered alongside other hormone testing to find the underlying cause of symptoms affecting the reproductive system.
Both men and women produce this hormone.
In Women, FSH is responsible for managing the menstrual cycle, ovaries stimulation, and egg production. Not having enough FSH or having too much can make it harder to get pregnant. The test is used to help diagnose or evaluate:
In men, FSH is a part of the development of the gonads and sperm production. The test is used to help diagnose or evaluate:
In children, FSH is involved with the development of sexual features. This test is used to help diagnose or evaluate:
High FSH levels could be caused by:
Low FSH levels could be caused by:
High FSH is commonly due to low-functioning testicles. Common reasons are:
Low FSH levels can be caused by the pituitary gland or hypothalamus not producing normal amounts of its hormones.
High FSH levels in children may mean puberty is about to start.
This is a single-marker test measuring follicle-stimulating hormone (FSH). FSH is used in the differential diagnosis of gonadal and pituitary insufficiency.