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


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Quest Diagnostics Test Code: 7137

Follicle-stimulating hormone (FSH) is a sex hormone that helps to stimulate the production of sperm in men and eggs in women. FSH is made in the pituitary gland which is found in the brain. A disruption or abnormality in the level of FSH can point to a problem with either the reproductive organs or alternatively a problem or disturbance in the functioning of the pituitary gland, such as a pituitary adenoma. It is often used to help differentiate a cause for infertility or menstrual abnormalities. In children, FSH, in combination with LH can be used to help diagnose early or delayed puberty.

This test also measures the amount of Luteinizing Hormone (LH) in the blood.  LH is a hormone produced by the pituitary gland.  In women, LH stimulates ovulation as well as the production of estradiol and progesterone.  In men, LH stimulates the production of testosterone.  Measuring Luteinizing Hormone can be useful in evaluating the cause of infertility or aiding in the diagnosis of disorders affecting the pituitary, ovaries or testicles.  In children, measuring LH can help determine the cause of early or delayed puberty.

This test is typically ordered for men or women who are having difficulty conceiving or are experiencing symptoms of a pituitary disorder.  LH is often done along with other blood tests such as FSH, Estradiol, Testosterone or Progesterone.


It is recommended that someone taking Biotin (also known as vitamin B7 or B8, vitamin H, or coenzyme R) stop consumption at least 72 hours prior to the collection of a sample.

This test is performed in following conditions such as:

• Problems falling pregnant
• Irregular or absent menstrual
• To determine menopause
• In men with a low sperm count
• Suspected pituitary adenoma or disorder


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround time for this test is typically 1 business day.