The Meaning Of The Location Of The Gestational Sac For Placenta Previa Screening In Pregnant Women With A History Of Cesarean Section

Objective:To explore the relationship between the location of the gestational sac in early pregnancy and placenta previa in the third trimester in order to improve the early screening of placenta previa patients.Method:Select pregnant women from Jiangxi Province Maternal and Child Health Hospital from February 2016 to June 2016,Trials were selected based on the following inclusion criteria:pregnant women with a history of cesarean section;willing to terminate pregnancy in our hospital;informed consent.The general information was registered after the signing of the informed consent book:name,age,pregnancy history,the distance from the gestational sac to the uterine scar by B-ultrasound within 30-60 days.The location of the early gestational sac was described as the distance from the gestational sac to the uterine scar by B-ultrasound within 30-60 days of pregnancy,And divided it into three groups,0-15mm was group I,16-30mm was group II,31-45mm was group III.To track the distance from the lower edge of the placenta to intrauterine cavity of the three groups of pregnant women in the third trimester of pregnancy through the B-ultrasound or the operation and whether or not the placenta was implanted,placenta body position(according to its attachment site was divided into anterior wall placenta and non-anterior wall placenta).3 days before childbirth,B-ultrasound or intraoperative examination revealed that the distance from the lower edge of the placenta to the intrauterine cavity less than 20 mm was included in the placenta previa.To compare whether the rate of placenta previa and placenta accrete in three groups was statistically different.In addition,pregnant women who were finally diagnosed with placenta previa were classified into placenta accreta group and nonplacenta accreta group according to whether the placenta was merged or not.To compare the two groups of pregnant women in the age,number of pregnancy,the number of abortions,the number of cesarean sections and whether the placenta body located in the anterior uterine wall was statistically different.Result:The rate of placenta previa in group ? and group ?,group ? and group ?was statistically different(P<0.05).There was no significant difference in the rate of placenta previa in group ? and group ?(P>0.05).There was no statistical difference in the rate of placenta accerta in the 3 groups.In the 20 cases of placenta previa.There was no statistical significance in the age of pregnant women,the number of abortions,the number of cesarean sections and the position of the placenta in the placenta accreta group and the nonplacenta accreta group(P>0,05).There was statistically significant difference between the number of pregnancy and the number of abortions(P<0.05).Conclusion:1.For women with a history of cesarean section,the distance from the gestational sac to the uterine scar was less than or equal to 15mm.The risk of placenta was increased significantly if pregnancy again,especially for pregnant women with multiple history of pregnancy or abortion were more likely to have placenta accrete.Such pregnant women should strengthen intensive care during pregnancy.2.When the distance from the gestational sac to the uterus scar was greater than 15mm,the risk of placenta previa decreases gradually with distance.