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Circadian variations in serum concentrations of human chorionic gonadotropin, human chorionic somatomammotropin, oestradiol and progesterone during pregnancy
P. Zulu 1, Q. Di Nisio 1
Affiliation
Article Info
1 Institute of Obstetrics and Gynecology, Universily of Chieti
Abstract
Serum concentrations of oestradiol, proge-sterone, human chorionic somatomammotropin and human chorionic gonadotropin were measured three times daily (morning, afternoon and night) during early, middle and late pregnancy, in order to investigate the existence of a circadian secretion rhythm. Twenty four women participated in the study. The results indicate the existence of a circadian secretion rhythm for oestradiol and human chorionic somatomammotropin during the second half of gestation.