LH

Alternative names:

ICSH; luteinizing hormone

Normal values:

• male: 7 to 24 U/L
• female: greater than 6-30 U/L

Note: U/L = units per liter

What abnormal results mean:

Greater-than-normal levels of LH may indicate:

• anorchia (lack of, or nonfunctioning, testes)
• 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:

• anovulatory bleeding
• infertility
• multiple endocrine neoplasia (MEN) I
• ovarian cysts