Hormones · Pituitary feedback
Men Women (soon)
Follicle-stimulating hormone tells you what the pituitary is doing to compensate for ovarian aging. A day-3 FSH >10 IU/L suggests diminished ovarian reserve; >25 suggests perimenopause.
Optimal range
3–10 (cycle day 3)IU/L
Avg. cost (US)
$45
Test frequency
Day-3 baseline if fertility-relevant; otherwise as needed
When to measure
Cycle day 3 (between days 2 and 4 of menses). Single value unreliable — confirm with AMH + antral follicle count.
How to measure
Serum immunoassay.
Average cost
≈ $45 cash price. Often covered by insurance with relevant ICD-10.
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