FSH is secreted by the pituitary gland and controls the growth and maturation of eggs in women and sperm production in men.

Diagnostic Value: Abnormal FSH levels can help diagnose menopause, primary ovarian insufficiency, polycystic ovary syndrome (PCOS), or testicular dysfunction.

Clinical Importance: Measuring FSH assists in evaluating infertility, irregular cycles, and pituitary gland disorders. In men, it helps determine the cause of low sperm count.

Symptom Correlation: High FSH in women often signals ovarian decline or menopause; low levels may reflect pituitary or hypothalamic issues.

FSH testing provides key insight into reproductive health and hormonal feedback between the brain and gonads.