LH blood test

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ICSH; Luteinizing hormone

• Normal adult male: 7 to 24 IU/L
• Normal adult female: 5 to 20 IU/L, with the midcycle peak about 3 times the base level

Note: IU/L = international units per liter

Normal values can be different depending on the lab and the test used. Ask your health care provider for the normal values for your test.

Greater-than-normal levels of LH may indicate:

• Anorchia (absence of testes or testes that do not function)
• Hypogonadism
• Klinefelter's syndrome
• Menopause
• Ovarian failure (see Ovarian hypofunction)
• Polycystic ovary disease
• Precocious puberty
• Turner's syndrome

Lower-than-normal levels of LH may indicate hypopituitarism.

Additional conditions under which the test may be performed include:

• Anovulatory bleeding
• Infertility
• Multiple endocrine neoplasia (MEN) I
• Ovarian cysts

Review Date: 08/08/2005
Reviewed By: Sharon Roseanne Thompson, M.D., M.P.H., Clinical Fellow, Department of Obstetrics & Gynecology, Brigham and Women's Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.