Gonadotropin Output in Congenital Adrenal Hyperplasia before and after Adrenal Suppression

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Abstract
Basal release of gonadotropin and the response to an infusion of 100 μg of syntheticluteinizing hormone releasing hormone (LRH) were studied in a teenage girl with congenital adrenal hyperplasia (CAH). The initial study was done during a period of poor adrenal suppression, and the second study was done after adequate adrenal suppression was achieved. To assess adrenal function, circulating levels of adrenal steroid hormones were evaluated continuously over a 24 h period. During the period of increased production of adrenal androgens, the pattern of gonadotropin release was that of a prepubertal child. After 3 months of adrenal suppression the pattern of gonadotropin secretion was similar to that of a normal girl in mid-puberty. This demonstrates the rapidchange from prepubertal to pubertal gonadotropin dynamics in a teenage patient following adequate suppression of androgens from the adrenal.

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