FSH (Follicle Stimulating Hormone) – Serum, Plasma, or Whole Blood, Mass Concentration

What Is FSH Used For?

FSH testing is often done to evaluate reproductive health, diagnose hormonal imbalances, or assess conditions like infertility, early menopause, or polycystic ovary syndrome (PCOS) in women. In men, it may help identify issues like low testosterone or hypogonadism. Your doctor may also order it to monitor treatment for fertility problems.

When Might You Need This Test?

You might need an FSH test if you have symptoms like irregular periods (in women), missed periods, infertility, low libido, or unexplained hormonal changes. Doctors may also recommend it during fertility evaluations, before or after hormone therapy, or to check for conditions like ovarian reserve depletion.

What Does a Low or High FSH Level Mean?

Low FSH could indicate problems with the pituitary gland, ovarian dysfunction (in women), or conditions affecting hormone production. High FSH may signal early menopause, ovarian failure, or certain genetic disorders. In men, elevated FSH might suggest low testosterone or testicular issues.

How Is the Test Done?

A blood sample is taken from a vein in your arm. You may feel a slight pinch, but it’s usually quick and painless. No special preparation is needed unless your doctor instructs otherwise.