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luteinizing hormone (lh)

luteinizing hormone (lh) is produced by the pituitary gland. in women, lh helps regulate the menstrual cycle and egg production (ovulation); in men, lh stimulates the production of testosterone, which plays a role in sperm production.

women's lh levels normally vary with the phase of the menstrual cycle, rapidly increasing just before ovulation occurs. this "lh surge" is a dependable sign that a woman is in a fertile time of her cycle. men's lh levels normally remain constant.

abnormally high or low lh levels can be a sign of an inability to produce eggs or sperm.

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this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

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