Fasting Required: No Specimen: Blood Results: 2 Business days Description: FSH levels help determine why a man has a low sperm count and is useful in the investigation of menstrual irregularities. It is also useful in the diagnosis of pituitary disorders or diseases involving the ovaries or testes. Methodology Immunoassay (IA) Limitations Only third generation FSH testing is appropriate to assess gonadal dysfunction in non-adults (<18 years). Combined with luteinizing hormone (LH), FSH is useful in the diagnosis and management of infertility and in monitoring FSH suppressive therapy. Clinical Significance This test is useful in the differential diagnosis of pituitary and gonadal insufficiency and in children with precocious puberty. Alternative Name(s) Follicular Stimulating Hormone, Follicle Stimulating Hormone