GnRH stimulation test

GnRH stimulation test

Urology A test used to evaluate adequacy of testosterone production Ref range At 30–45 mins, serum LH levels ↑ 3 to 6 fold; FSH levels ↑ 20 to 50% Abnormal values ↑ LH and FSH in 1º testicular failure; normal to ↓ in hypothalamic or pituitary disease. See Testosterone.