Labor in humans: 1. progesterone, 20 α-dihydro-progesterone, estrone and 17 β-estradiol in near placental and most distant human amnion and chorion laeve in various stages of labor at term
Abstract:In some species the onset of labor is regulated by changes in the estrogen/progesterone ratio. The same change in fetal membranes has been suggested to be one of the triggering mechanisms of labor in humans. In order to examine if a gradient in steroid concentration existed in fetal membranes and if changes in concentrations could be observed with the onset and advancing labor, the concentration of progesterone (P), 20 alpha-dihydro-progesterone (20 alpha-OHP), estrone (E1) and 17 beta-estradiol (E2) were dete… Show more
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