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Gonadotropin pulsatile secretion in girls with premature menarche

, : Gonadotropin pulsatile secretion in girls with premature menarche. Hormone Research 33(1): 5-10

Five prepubertal girls (2.3-8.1 years old) were studied for isolated or recurrent vaginal bleeding in the absence of other signs of precocious puberty (premature menarche). Four of these girls with recurrent vaginal bleeding were studied for pulsatile gonadotropin secretory patterns. During sleep 3 girls showed luteinizing hormone (LH) pulses with low amplitude and a pubertal pattern of frequency whereas follicle-stimulating hormone (FSH) increased without demonstrable episodic secretion. Luteinizing hormone-releasing hormone (LHRH) tests demonstrated that FSH responses are greater than the LH responses, as in prepuberty. In 3 cases estradiol levels had augmented above normal prepubertal range. The menses spontaneously stopped during the follow-up. A reevaluation of the gonadotropin pattern, having the menses stopped for 6 months, in one of the girls with pulsatile LH secretion showed an apulsatile prepubertal LH pattern. Also estradiol levels returned to prepubertal range. A follow-up of 10-66 months of these patients did not show any growth and bone acceleration or signs of precocious puberty. Our data suggest that in premature menarche a partial and transient activation of hypothalamo-pituitary axis could be present. Premature menarche seems to be a benign and self-limiting condition and one of the girls had a normal onset of puberty during follow-up.


PMID: 2115858

DOI: 10.1159/000181436

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