The entrance of the umbilical cord near the edge of the lower edge of the placenta is generally not dangerous, however, it can be dangerous if the cord is attached to the fetal membranes. The entrance of the umbilical cord near the edge of the placenta is generally called a racket placenta, and is a form of placental attachment that does not generally affect the health of the mother as well as the fetus, and is often found during examination of the placenta when it is delivered after labor. If the umbilical cord is attached to the fetal membranes, the blood vessels of the umbilical cord will enter the placenta through the chorionic villus and the amniotic membrane. Once the blood vessels on the fetal membranes cross the cervical os and are in front of the fetal prenatals, when contraction occurs, it is easier for them to be compressed by the fetal prenatals, which leads to rupture of the blood vessels or rupture of the blood vessels when the membranes are ruptured, which is a more dangerous condition and will easily lead to the fetus’s ischemia and hypoxia, or even death in an instant. It is recommended that pregnant women need to actively participate in all periods of maternity checkups during pregnancy, and find problems that need to be corrected as soon as possible.