Follicle Stimulating Hormone (FSH) - Male Population Reference Range

What Is FSH and Its Role in Men?

Follicle Stimulating Hormone (FSH) is a hormone that stimulates sperm production in men. It is released by the pituitary gland in response to signals from the brain, particularly from the hypothalamus. FSH works together with another hormone, luteinizing hormone (LH), to regulate sperm production in the testes. Abnormal levels of FSH can indicate problems with sperm production, testicular function, or hormonal imbalances.

Why Might Your Doctor Order This Test?

Your doctor may order an FSH test to investigate symptoms such as low libido, erectile dysfunction, infertility, or unexplained low sperm count. It can also be used to diagnose conditions like Klinefelter syndrome, testicular failure, or hormonal imbalances affecting fertility.

Sample Collection and Preparation

This test requires a blood sample, typically drawn from a vein in your arm. You may be asked to fast for a few hours before the test, but this is not always necessary. The sample is sent to a lab for analysis, where FSH levels are measured using a sensitive immunoassay method.

What to Expect Before and After the Test

Before the test, ensure you are well-hydrated and avoid strenuous activity the day of your appointment. After the blood draw, you may experience mild bruising, soreness, or swelling at the injection site. Rest and apply a cold compress if needed. Follow-up care is usually not required unless your doctor advises otherwise.