Spontaneous and induced labor: Two roles for the prostaglandins.
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Biomedical subjects
Publications and source records attributed to J J Amy.
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Labor was successfully induced or stimulated with intravenous Prostaglandin E2 (0.1-2.0 microgram/min) in a group of twenty-nine hypertensive gravidae at 36-41 weeks' gestation. No adverse maternal or perinatal effects of the drug were recorded.
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A list of prerequisites, essential items of information and definitions applying to studies on induction of labour is presented. It is suggested that their use would permit proper analysis and comparison of results obtained by different investigators.
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Present study was prompted by the report from another center on the occasional occurrence of convulsions and abnormal electroencephalogram (E.E.G.) patterns in women aborted with intra-amniotic prostaglandin F2alpha (PGF2alpha). Fifty four subjects were investigated by means of an E.E.G. taken before and after initiation of PGE2 administration. They included pregnant and non-pregnant patients, nearly half (23) of whom were known epileptics. One seizure was observed during PG administration in a man with daily psychomotor attacks who had not taken his anticonvulsants on the day the test was performed. PGE2 caused no alteration of the E.E.G. in subjects with a normal control tracing; in those with an abnormal E.E.G., a deterioration was seen in one and an improvement in three. It is concluded that PGE2 is not epileptogenic at doses required for termination of pregnancy.
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During the second hour after giving 100 mug of orally administered prostaglandin 15 (R) 15-methyl-E(2) methyl ester in the pregnant patient at term a noticeable reduction in basal gastric acid secretion took place. At this dose no excessive uterine stimulation was observed. Prostaglandin 15 (R) 15-methyl-E(2) methyl ester could prove of value in the preoperative preparation of the pregnant patient before anaesthesia for reducing the incidence of acid regurgitation.
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