In eight teenage patients with Turner's syndrome, LH and FSH were measured at 20-min intervals for 24 h. The 24-h mean LH and FSH levels ranged from 20.2-70.5 mIU/ml and 60.4-229 mIU/ml, respectively. There was a significant positive correlation between the individual LH and FSH levels in the eight patients; the common correlation coefficient was 0.449 (P less than 0.001). The 24-h mean estradiol level was measurable in only two of the patients and the 24-h mean testosterone level for the eight patients was 0.10 ng/ml. The mean LH concentration during sleep was significantly higher (P less than .01) than during waking. The mean FSH concentration during sleep was also significantly higher (P less than 0.05) than during waking. The LH and FSH peak levels after LRH were significantly correlated with the 24-h mean LH (r = 0.918; P less than 0.01) and FSH concentrations (r = 0.754; P less than 0.05), respectively.
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