title: A diphasic pattern of gonadotropin secretion in patients with the syndrome of gonadal dysgenesis.
abstract: Cross sectional and longitudinal studies of plasma FSH and LH in 58 patients, age 2 days of 20 yr, with the syndrome of gonadal dysgenesis show a diphasic pattern of gonadotropin secretion. The mean basal plasma FSH level is 43 plus or minus 7 (SE) ng/ml (LER-869) in patients from 2 days to 4 yr, which is strikingly elevated. Thereafter, a decline in plasma FSH to a mean level of 4 plus or minus 0.7 (SE) ng/ml occurs between 4 and 10 yr, followed by a rise after 10 yr to 61 plus or minus 4 (SE) ng/ml. The pattern of LH (LER-960) secretion is qualitatively similar to that of FSH, although quantitatively the values for LH are 1/3 to 1/10 those for FSH. The similarity of pattern of gonadotropin secretion observed between patients with gonadal dysgenesis and normal children suggests that gonadal function does not play a decisive role in the pattern of gonadotropin secretion from infancy through adolescence, but exercises striking effects on the quantity of gonadotropin secreted.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004958:Estradiol / Q000097:blood; D004970:Estrone / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000378:metabolism*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007986:Luteinizing Hormone / Q000378:metabolism*; D011863:Radioimmunoassay; D014424:Turner Syndrome / Q000378:metabolism*
chemical_list: D004970:Estrone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone