Marginal entrance of the umbilical cord at 30 weeks is of some consequence for fetal growth and development. The umbilical cord carries out transportation The umbilical cord is an important channel for gas exchange, nutrient supply and metabolite discharge between mother and child. When the umbilical cord is compressed and the blood flow is obstructed, the fetus may suffer from hypoxia, even endangering the life of the fetus. If the umbilical cord has a marginal inlet, a marginal inlet within two centimeters of the placenta will have less effect on the fetus, but if it occurs beyond two centimeters of the placenta, it may lead to fetal hypoxia to a certain extent, and never jeopardize the normal development of the fetus, and in severe cases, it may also lead to miscarriage. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to more rest, and at the same time should be relaxed, to avoid the emergence of tension, anxiety. If the results of the umbilical cord borderline entrance examination are abnormal, it is recommended to consult a doctor in time, with the help of the doctor to carry out targeted treatment or treatment.