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LH (Luteinizing Hormone) Serum

The Luteinizing Hormone or LH Test measures how much of the hormone is in your blood. The LH is produced by the pituitary gland in both men and women.

In females, this hormone helps regulate the menstrual cycle and egg production. It is common to see LH levels rise and fall during the monthly menstrual cycle. It is also useful in the production of estrogen and progesterone.

In males, LH is responsible for the release of testosterone (which plays a role in producing sperm).

Why Do I Need It?:
The LH Test can help men and women in a lot of ways, such as helping find the cause for the couple’s infertility or help evaluate a man’s sperm count or a woman’s egg supply. It can also give insight on puberty, menstrual cycle issues, and ovulation timing, among others.

Test Details:
Normal Range:
Men’s levels should be between 1.5- 9.3mL. For women, normal levels depend upon what stage of the menstrual cycle you are in. For example:

Follicular Phase 1.9-12.5mL
Mid-Cycle 8.7-76.3mL
Luteal Phase 0.5-16.9mL
Postmenopausal 5.0-52.3mL

High Results Indicate:
In men, high levels can indicate testicular failure, defects in testicular growth or testicular injury. In women, high levels can indicate menopause or primary ovarian failure.

Low Results Indicate:
Low levels of LH can indicate a number of disorders such as secondary ovarian failure, problems with the pituitary or hypothalamus in women.