A luteinizing hormone test measures the
amount of luteinizing
hormone (LH) in a sample of blood or urine. LH is
produced by the
- In women, LH helps regulate the
menstrual cycle and egg production (ovulation). The level of LH in a woman's body varies
with the phase of the menstrual cycle. It increases rapidly just before
ovulation occurs, about midway through the cycle (day 14 of a 28-day cycle).
This is called an LH surge. Luteinizing hormone and
follicle-stimulating hormone levels rise and fall
together during the monthly menstrual cycle.
- In men, LH stimulates
the production of
testosterone, which plays a role in sperm
Sarah Marshall, MD - Family Medicine
Femi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology
May 18, 2011
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