Monochorionic twin pregnancies increases perinatal risk and is a high risk factor of selective intrauterine growth restriction

Abstract Background Twins pregnancy can cause a lot of disease, especially monochorionic twin pregnancies, the prenatal infant will have many diseases and have high mortality rate. According to analysis and compare of the twin pregnancy, especially pregnant woman and puerpera’s situation and complication and baby’s situation; we hope we can find the reason which causes the fetus growth restrain of monochorionic twin pregnancies. So we can provide some reference for the prenatal health care, complication prevention and prenatal outcome. Methods We divided 489 cases of twin pregnancies into two groups: monochorionic twin and dichorionic twin and compared the clinical features of them. At last, we used the logistic regression analysis method to analyze the risk factors of selective intrauterine growth restriction(sIUGR). Results The incidences of premature rupture of membranes and sIUGR were significant higher in monochorionic twin and twin-twin transfusion syndrome (TTTS) only exists in monochorionic twin. The weight of the newborn babies(both big and small babies)were significant lower in Monochorionic twin. The neonatal transfer rate was significant higher in monochorionic twin. Gestational weeks and weight of newborn babies are the high risk factors of sIUGR. Conclusions The type of chorion has a great influence to the pregnant period and the ending of maternal women. Monochorionic is a high risk factor of the sIUGR, which means that the main cause of sIUGR is from placenta, so it is a kind of “placental origin disease”.