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- W2000940631 abstract "To investigate the detailed pattern of circulating gonadotropin and estradiol (E2) concentrations around the onset of puberty, plasma gonadotropin and E2 were measured at 20-min intervals for 24 h in seven prepubertal and six early pubertal normal short girls. The hormone concentrations obtained were analyzed by Cluster pulse detection algorithm, cosinor analysis, and cross-correlation analysis. All subjects showed spontaneous LH and FSH pulses, and six early pubertal girls showed spontaneous E2 pulses. Cosinor analysis revealed 24-h LH rhythms in all subjects except two early pubertal girls and 24-h FSH rhythms in all subjects except one early pubertal girl. The acrophases (clocktime for maximal value) in the 24-h rhythm of LH and FSH were both found in the late hours of sleep. All subjects except three prepubertal girls showed significant 24-h E2 rhythms. In contrast to the 24-h LH and FSH rhythms, the acrophase of the 24-h E2 rhythm was found in the daytime waking period. Cross-correlation analysis demonstrated significant positive cross-correlations between LH and E2 that were maximum at an E2 lag of 5.7-9.3 h in three of the six early pubertal girls. In conclusion, the E2 concentration profiles in girls around the onset of puberty show marked 24-h rhythm, with acrophase during the daytime waking period. There exists a 5.7- to 9.3-h time lag between LH and E2 time series, and this long time lag might correspond to the time required for aromatization for E2 synthesis." @default.
- W2000940631 created "2016-06-24" @default.
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- W2000940631 date "1993-12-01" @default.
- W2000940631 modified "2023-09-25" @default.
- W2000940631 title "Twenty-four-hour concentration profiles of gonadotropin and estradiol (E2) in prepubertal and early pubertal girls: the diurnal rise of E2 is opposite the nocturnal rise of gonadotropin." @default.
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- W2000940631 doi "https://doi.org/10.1210/jcem.77.6.8263151" @default.
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