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  • Title: Mid-trimester abortion with 15 (S) methyl prostaglandin F 2 alpha.
    Author: Leibman T, Saldana L, Schulman H, Cunningham MA, Randolph G.
    Journal: Prostaglandins; 1974 Sep 10; 7(5):443-8. PubMed ID: 4424912.
    Abstract:
    The efficacy of intramuscular administration of 15 methyl (15S) prostaglandin F2alpha (PGF2a) in midtrimester pregnancy termination was evaluated in 16 healthy patients (mean age, 23.3; mean parity, 1.4; mean number of menstrual weeks, 16.1) by measuring dose response; oxytocin conversion; abortion time; side effects; intrauterine dynamics and progesterone withdrawal. Labor was monitored using extraovular balloon placed transvaginally; transcervically; and connected to a Physiograph machine. Patients not aborting within 48 hours after the first dose were considered failures. Blood samples were collected at 0, 3, and 6 hours and at abortion time for plasma progesterone measurement. Average dose given was 789 +or- 60 micrograms. Only 9 of 10 patients aborted within the prescribed 48 hours: 7 were complete abortions, and 2 were incomplete and required suction curettage. Mean induction to abortion time was 20.2 +or- 2.7 hours. Nausea, vomiting and diarrhea were the main side effects. The findings suggest that 15 methyl PGF2a in the dosages and routes prescribed is not as efficient as PGF2a. It is also suggested that prostaglandin affects the myometrium at 2 levels: 1) a membrane effect, and 2) a more fundamental intracellular regulatory effect which is necessary to initiate labor.
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