Hormonal therapy and pubertal development in boys with selective hypogonadotropic hypogonadism.

The authors have compared the effects of treatment with weekly injections of human chorionic gonadotropin (hCG) with those of monthly testosterone (T) injections in males with hypogonadotropic hypogonadism. There was no significant difference in pubertal development as measured by progression through the Tanner stages, final height, or bone age, with the two treatment regimens. The final testicular volume in patients treated with 5,000 U/week of hCG (14.0 +/- 2.0 ml) was significantly greater than that in patients treated with 250-mg monthly T injections (4.3 +/- 1.8 ml) (P less than 0.01). This study shows that weekly injections of hCG are effective in achieving virilization in hypogonadotropic hypogonadic males, leading to a greater testicular growth than T preparations. Therefore, hCG treatment may have an advantageous effect on the eventual induction of fertility with human menopausal gonadotropin.