Neuroendocrine aberrations in women with functional hypothalamic amenorrhea

The Journal of Clinical Endocrinology and Metabolism
S L BergaS S Yen

Abstract

To further elucidate the neuroendocrine regulation of anterior pituitary function in women with functional hypothalamic amenorrhea (FHA), we measured serum LH, FSH, cortisol, GH, PRL, TSH concentrations simultaneously at frequent intervals for 24 h in 10 women with FHA and in 10 normal women in the early follicular phase (NC). Using the same data, we separately analyzed the cortisol-PRL responses to meals in these women. In addition, the pituitary responses to the simultaneous administration of GnRH, CRH, GHRH, and TRH were assessed in 6 FHA and 6 normal women. The 24-h secretory pattern of each hormone except TSH was altered in the women with FHA. Compared to normal women, the women with FHA had a 53% reduction in LH pulse frequency (P less than 0.0001) and an increase in the mean LH interpulse interval (P less than 0.01); LH pulse amplitude was similar. The 24-h integrated LH and FSH concentrations were reduced 30% (P = 0.01) and 19% (P less than 0.05), respectively. The mean cortisol pulse frequency, amplitude, interpulse interval, and duration were similar in the two groups, but integrated 24-h cortisol secretion was 17% higher in the women with FHA (P less than 0.05). This increase was greatest from 0800-1600 h, but also w...Continue Reading

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