A study on some risks of pregnant women with placenta previa

Abstract

Placenta previa is an obstetric emergency. It is a leading cause of dangerous complications in pregnancy and fetus such as severe haemorrhage. The underlying cause of placenta previa is unknown clearly. The incidence of placenta previa increases in women with history of repeated birth, cesarean section, leiomyomata… Method: A case-control study on 56 pregnant women with placenta previa and 154 pregnant women in the control group at Hue Central Hospital. Objective: to study some risks of pregnant women with placenta previa. Results: the incidences in women with history of abortion, miscarriage and history of uterine inflammation accounted for 8.9%, OR = 7.7 (CI = 1.4-41.2) and 1.8%, OR = 2.7 (CI = 0.1-45.2). The number of giving birth ≥ 4 made up 10.7% incidence of OR = 9.1 (CI = 1.7-46.6), p < 0.05. The incidence rate of multiple pregnancy, uterin malformation, history of birth control and placenta previa was 3.6%, 3.6%, 5.4% and 7.1% respectively. Women with history of uterine scar made up 33.9% of incidences, OR = 2.3 (CI = 1.2-4.7). History of intrauterine device took 37.5% of incidences, OR = 1.3 (CI = 0.7-2.5). The group of placenta previa with blood transfusion accounted for 19.6%, OR = 18.5 (CI = 3.9-86.9), and coagulation disorders cocupied 1.8%. Fetal distress made up 14.3%. Cesarean section in the case group was 94.6% (35.7% in the control group), OR = 31.8 (CI = 1.5-15.9). There were high risks of placenta previa in women with multiple birth, uterine scar, intrauterine manouver.