Follicle-Stimulating Hormone (FSH) & Luteinizing Hormone (LH)


This blood test measures Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) levels. Hormones behave as chemical messengers throughout the body. Hormones stimulate certain life processes and inhibit others. Even mental conditions and personality traits are dependent on hormones.

The brain produces FSH and LH in order to control the production and release of sex hormones including testosterone and estrogen. FSH and LH regulate the development, growth and reproductive processes of the body. In aging men and women, a rise in FSH and LH indicates the onset of menopause in women and andropause in men. In women that are still menstruating, low levels of FSH and LH may indicate excessive estrogen and may lead to estrogen dominance. In this hormonal state there is an increased risk for disorders such as polycystic ovarian disease and fibrocystic breast disease.

Test Preparation For Optimal Results:

If possible, have the lab collected early in the morning or shortly after waking. For comparison purposes, have subsequent labs collected close to the same time. If you are still menstruating it is suggested that you test FSH and LH around day 21 of your cycle.

Disclaimer: A health care provider should evaluate a deviation from normal ranges.