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.
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The GnRH stimulation test correlates neither with testicular hypotrophy nor with long-term semen parameters and fertility.
In another study, we found abnormal results on GnRH stimulation tests in 30% of 104 teenagers with varicoceles but not in 10 control patients.
As the basal hormonal profiles revealed typical secondary hypothyroidism and hypogonadism, no TRH and GnRH stimulation tests were performed.