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Abstract Objective: To analyze the related factors and perinatal outcomes of the dangerous placenta previa. Methods: A retrospective analysis included the clinical data of 60 patients with dangerous placenta preplacenta ( in observation group) and 100 patients with nonlethal placenta previa ( in control group) who received therapy in maternal and child health care hospital of Gansu province from January 2015 to December 2017. The univariate analysis and multifactor analysis were used for analyzing the clinical data of women in both groups, and the perinatal outcomes were compared between the two groups. Results: The incident of gestational diabetes and gestational hypertension had no significant difference between the two groups (P>0.05). The age, education level, gravidity times, and number of abortion and cesarean section of women in observation group were all significantly higher than those of women in control group (P<0.05). There was significant difference in residence of women between the two groups (P<0.05). Logistic regression model analysis showed that the age, education level, residence, gravidity times, and number of abortion and cesarean section were the independent risk factors for the dangerous placenta. The volume of prenatal bleeding and postpartum hemorrhage, the rate of premature infant, neonatal asphyxia, and 1-minute Apgar score<7 in observation group were significantly higher than those in control group (P<0.05). Conclusion: The older age, education level, residence, b gravidity times, and number of abortion and cesarean section are the independent risk factors for the dangerous placenta, so the management of high-risk pregnant women should be strengthened for reducing postpartum hemorrhage, and premature birth, and for decreasing other adverse perinatal outcomes.
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