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76 cases of placenta previa out of 3,310 deliveries were experienced during the period of 42 months from January, 1972 to june, 1975 in the Dept. of Obst. and Gynec. Han Gang Sung Sim Hospital, Chung-Ang University with the following results; 1. The incidence of placenta previa was more frequent in multiparas than in primiparas as in the other reports increasing highly as the age advances. 2. Evaluation of the management for the preceding pregnancy revealed that the history of curettage and the other injurious processes to the endometrial surface, was available in 61.9%. These processes were supposed to incur anatomical changes to the endometral surface, accounting for the high incidence of placenta previa in the author`s and cases. 3. The varieties of placenta previa incluede 27 cases of totales, 36 cases of the partialis and 13 cases of low-lying placenta. In 12 cases of these, planta previa in the author`s and cases. 4. The amount of hemorrhage in placenta previa was massive in 57 cases, moderate in 4 cases, scanty in 14 cases, and none in 1 case respectively. 51 cases among these took the onset of hemorrhage before 35 weeks of gestation, 25 cases after 36 weeks. 5. The hemorrhage accompanied no pain in 49 cases(64.5%), but regular or irregular pain in 24 cases(31.6%). 6. Abnormal presentation were noted in 10 of 28 cases over 39 weeks of gestation and in 40 of 48 cases below 38 weeks of gestation. 7. The value of hemoglobin checked antepartum, was less than 10 gm/dl in 39 cases. Body temperature was lower than 36°9` in 54 cases, 37 to 37°9` in 22 cases. 8. Placenta previa was diagnosed by clinical symptoms and palpation of placenta in 58 cases, 7 cases by clinical symptom, placental palpation and placentography. 5 cases by clinical symptom and placentography, 3 cases during operation for abruptio placenta, premature rupture of membrane and C.P.D., and 3 cases in the trial of manual seperation of placenta after vaginal delivery. 9. Method of delivery included low transverse section in 27 cases (35.5%), classical seciton in 22 cases(29%), cesarean hystrectomy in 11 cases(14.5%) and vaginal delivery in 16 cases(21%). 10. Amniotomy was applied in an effort to control hemorrhage in 13 cases with successes, 10 cases within which 2 primigravidas were included, were delivered through vaginal rout, 3 by cesarean section. 11. The perinatal mortality rate was much lower in the fetuses over 2,500gm (1 1.4%) and 36 weeks of gestation(11.9%) than subgroup. The perinatal mortality rate was over 3 times higher in the total placenta previa as in the other varieties. 12. Expectant management for placenta previa was succesful only in 1 case. It was found wise to lengthem the gestational period, if possible, till 36 weeks with the patients hospitalized.
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