Test Name: FSH
Formal Name: Follicle Stimulating Hormone
Other Names: Follicle-stimulating hormone
Normal: Varies by menstrual phase. High (Post-menopausal): >30 IU/L (menopause). High (Pre-menopausal): Low LH/FSH ratio (PCOS).
Why Test: To evaluate ovarian function, menopause, or infertility.
When to Test: Irregular periods, difficulty getting pregnant, or symptoms of menopause.
Test Principle: Immunoassay (Chemiluminescence).
Q1: What is a "high" level in men? A1: FSH is usually low in men; high levels can indicate primary testicular failure. Q2: Does it fluctuate? A1: Yes, it pulses from the brain.
