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  • Title: Effect of infused prostaglandin F 2 on hormonal levels during early pregnancy.
    Author: Wentz AC, Jones GS, Graeber J.
    Journal: Am J Obstet Gynecol; 1972 Dec 01; 114(7):908-13. PubMed ID: 4645129.
    Abstract:
    In light of the theory of prostaglandin (PG) mechanism of action as removal of a progesterone block mediating myometrial stimulation, the effect of PGF2alpha on hormonal patterns was analyzed in 8 patients between 11.5 and 18.5 weeks of gestation. PGF2 alpha was administered intravenously by pump and blood samples were drawn hourly during the first 12 hours and every 2 hours thereafter until abortion occurred. Serum estradiol (2) and estriol (E3) were assayed by radioimmunassay, as was plasma progesteronep. 2 patients had missed abortions; 5 of the 6 remaining patients aborted successfully. The remaining patient of 12 weeks gestation failed to abort. Missed abortion patients had absence of detectible E3 in serum, and E2 and P values were decreased 50%. 3 of 5 successful terminations showed decreases in E3 within first 4 infusion hours and aborted in 17 hours. A 4th patient showed a precipitous E3 drop at 16 infusion hours and aborted at 26 hours. 1 patient showed little E3 change until after abortion, and then it was a 50% decrease. Serum P declined in all 5 successful terminations. E2 values reduced within 4-8 hours before abortion and after infusion. The authors suggest that these findins show a direct effect of PGF2 alpha on steroidogenesis.
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