FSH Test

What is an FSH Test? – Comprehensive Guide

What is FSH?

FSH (Follicle-Stimulating Hormone) is an important hormone secreted by the pituitary gland that regulates the function of the ovaries. It controls egg development and ovulation.

Why is an FSH Test Performed?

It is used to assess ovarian reserve, investigate causes of infertility, and understand menopausal status.

When is an FSH Test Performed?

It is usually measured on the 2nd or 3rd day of the menstrual cycle. Values measured during this period provide the most accurate information about ovarian reserve.

What Do FSH Values Mean?

Low FSH: Normal or pituitary-related issues.
Normal FSH: Normal ovarian function.
High FSH: Indicates decreased ovarian reserve or approaching menopause.

FSH and Age Relationship

FSH levels increase with age. They particularly begin to rise after age 35 and significantly increase during menopause.

FSH and AMH Difference

While FSH provides indirect information about ovarian reserve, AMH is a more direct indicator of reserve. Therefore, it is recommended to evaluate them together.

FSH and Pregnancy

High FSH may indicate a reduced chance of pregnancy, but it is not a definitive determinant on its own.

FSH and Endometriosis

After endometriosis and especially ovarian surgeries, FSH may rise, indicating a loss of reserve.

Who Should Get an FSH Test?

Women planning pregnancy, experiencing menstrual irregularities, suspected of infertility, and at risk of early menopause.

Limitations of the Test

FSH alone is not sufficient. It should be evaluated in conjunction with AMH, ultrasound, and clinical findings.

Conclusion

The FSH test provides important information about ovarian reserve and hormonal status. It should be evaluated at the right time and in conjunction with other tests.