• Test Code - PL0129
  • Test Name - Luteinizing Hormone (LH)
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Test Details & Preparation


  • Luteinizing Hormone (LH) test is done to evaluate fertility issues, function of reproductive organs (ovaries or testicles), or to detect the release of an egg from the ovary (ovulation) to evaluate pituitary function.

  • In children, Luteinizing Hormone (LH) test is done to evaluate early or delayed sexual maturation (puberty).

  • For women, Luteinizing Hormone (LH) test is performed when you are having difficulty getting pregnant or are having irregular or heavy menstrual periods when you are tracking ovulation during your menstrual cycle.

  • For men, Luteinizing Hormone (LH) test is performed when your partner cannot get pregnant or you have a low sperm count, low muscle mass or decreased sex drive.

  • Luteinizing Hormone (LH) test is also performed when your doctor thinks that you have symptoms of a pituitary disorder or hypothalamic disorder or when he suspects that a child has delayed or earlier than expected sexual maturation.

  • A blood sample drawn from a vein in your arm sometimes a random urine sample or a 24-hour urine collection may be taken for a Luteinizing Hormone (LH) test.

  • No preparation is needed for a Luteinizing Hormone (LH) test, but the timing of a woman's sample will be correlated with her menstrual cycle.

  • In women, LH and FSH levels can help to differentiate between primary ovarian failures. Increased levels of LH and FSH are seen in primary ovarian failure.

  • In women who are trying to become pregnant, multiple LH tests can be used to detect the surge that precedes ovulation. An LH surge indicates that ovulation has occurred.

  • Low levels of LH and FSH are seen in secondary ovarian failure and indicate a problem with the pituitary or hypothalamus.

  • In men, high LH levels may indicate primary testicular failure. This can be due to developmental defects in testicular growth or to testicular injury.

  • Low levels of LH and FSH are seen in secondary failure of the testicles and indicate a problem with the pituitary or hypothalamus.

  • In young children, high levels of LH and FSH with the development of secondary sexual characteristics at an unusually young age are an indication of precocious puberty. This is much more common in girls than in boys.


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