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  • Title: Continuous extraovular administration of prostaglandin F2alpha for midtrimester abortion.
    Author: Lauersen NH, Wilson KH.
    Journal: Am J Obstet Gynecol; 1974 Sep 15; 120(2):273-80. PubMed ID: 4412615.
    Abstract:
    Midtrimester abortion was successfully induced in 74 of 76 patients by a continuous extraovular administration of (PGF2alpha) prostaglandin F2alpha via a constant-infusion pump. 2 patients in the 13th-14th weeks of gestation failed to abort despite good uterine activity. The mean abortion time for successful inductions was 16.21 hours. Parous patients aborted somewhat faster than nulliparous patients, but the difference was not statistically significant. All patients were monitored throughout the abortion procedure, and uterine activity was calculated and analyzed. Uterine activity developed within 15 minutes of PGF2alpha instillation and showed the characteristic uterine response to PGs with a sharp rise in intrauterine tonus. The gastrointestinal side effects in this series were much less than those reported for intraamniotic instillation of PG, and there was good patient tolerance of the procedure. The main complication of extraovular administration of PGF2alpha for midtrimester abortion was endometritis, which occurred in 7 patients. The patients who developed endometritis had, as a group, longer abortion times (mean=28 hours). 3 patients with severe preeclampsia and intrauterine death in the third trimester also had successfully induced labor with extraovular administration of PGF2alpha. The method of PGF2alpha administration in the series was found to have a high success rate, good patient tolerance, and fewer side effects than when abortion was induced by intraamniotic instillation of PGF2alpha.
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