Follicle-Stimulating Hormone (FSH) CPT: 83001


Pituitary Gonadotropin

Special Instructions

This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.

Expected Turnaround Time

Within 1 day

Specimen Requirements




0.8 mL

Minimum Volume

0.3 mL (Note: This volume does not allow for repeat testing.)


Red-top tube or gel-barrier tube.


If a red-top tube is used, transfer separated serum to a plastic transport tube. Avoid hemolysis.

Storage Instructions

Room temperature

Stability Requirements

Temperature Period
Room Temperature Not recommended
Refrigerated 7 days
Frozen 4 weeks
Freeze/thaw/ cycles Stable x 3

Patient Information

To evaluate fertility issues, function of reproductive organs (ovaries or testicles), or pituitary function

In children, to evaluate early or delayed sexual maturation (puberty)

For women, when you are having difficulty getting pregnant or are having irregular or absence of menstrual periods

For men, when your partner cannot get pregnant, or you have a low sperm count, low muscle mass or decreased sex drive

When your healthcare practitioner thinks that you have symptoms of a pituitary disorder or hypothalamic disorder

When a healthcare practitioner suspects that a child has delayed or earlier than expected sexual maturation

A blood sample drawn from a vein in your arm; sometimes a random urine sample or 24-hour urine collection may be taken.

None, but the timing of a woman’s sample will be correlated with her menstrual cycle.