Marginal cord entry, also known as racket placenta, or marginal cord insertion, refers to the point of insertion of the umbilical cord at the edge of the placenta. Normally, the insertion of the umbilical cord is in the center of the placenta, which facilitates blood supply and the use of the umbilical cord to transport nutrients to the fetus. Marginal umbilical cord inlet generally does not have much effect on the fetus or the mother, and will not cause fetal malformation, etc. However, it may affect the transportation of nutrients, so it is important to conduct standardized prenatal checkups in the late stages of pregnancy to keep track of the baby’s development. In addition, in the case of marginal umbilical cord inlet, the umbilical cord may prolapse before the baby is born, and the umbilical cord may be compressed at the exit of the birth canal, leading to intrauterine oxygen deprivation of the fetus. Pregnant women with borderline umbilical cord inlet must be closely monitored by a doctor during pregnancy to avoid adverse effects on the mother and baby.