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  • Title: Effect of prostaglandins on in vitro synthesis of progesterone and oestradiol-17 beta in placenta from early human pregnancy.
    Author: Rao B.
    Journal: Prostaglandins; 1979 Jul; 18(1):93-100. PubMed ID: 523676.
    Abstract:
    In vitro synthesis of progesterone and estradiol-17 beta from endogenous precursors was studied in the placenta from women in early stage of gestation (less than 7 weeks). Radioimmunoassay techniques were used to measure progesterone and estradiol-17 beta. It was shown that placental tissue from as early as six weeks of gestation can synthesize both progesterone and estradiol-17 beta in vitro. Prostaglandins F2 alpha and E2 in concentration of 100 micrograms/ml of the incubation media did not have any significant effect on the in vitro synthesis of progesterone and estradiol-17 beta in the placental tissue. It seems unlikely that the abortifacient effect of natural prostaglandins PGE2 and PGF2 alpha is due to their direct action on the synthesis of progesterone and estradiol-17 beta in the placenta.
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