It is possible to have a healthy baby with an abnormal umbilical cord. Common umbilical cord abnormalities include absent umbilical cord, single umbilical artery, too short umbilical cord, too long umbilical cord, too thick umbilical cord, too thin umbilical cord, and so on. 1. Absence of umbilical cord: If the umbilical chakra of the fetus is tightly connected to the placenta or the umbilical cord is attached to the fetal membranes in the shape of a sail, the fetus is often accompanied by a variety of malformations. 2. Single umbilical artery: A small percentage of fetuses with a single umbilical artery will have cardiovascular malformations, or malformations in other areas. 3. Umbilical cord too short: The length of the umbilical cord is shorter than 30 centimeters, which is easy to cause pressure on the umbilical cord blood vessels, lack of oxygen and so on, and cause maldevelopment, but there is also a possibility that the fetus is healthy. 4. Umbilical cord is too long: the length of the umbilical cord is more than 70 centimeters, the umbilical cord is too long, the fetus is prone to umbilical cord around the neck, entangled limbs, umbilical cord knot, etc., which is prone to cause intrauterine oxygen deprivation and developmental delay, but the fetus may also be healthy. 5. Umbilical cord is too thick: pregnant women with a thick umbilical cord often experience early placental abruption, premature rupture of membranes, fetal malformation, stillbirth, stillbirth, etc., but the fetus may also be healthy. 6. Umbilical cord is too thin: if the umbilical cord is obviously thinner than half of the normal diameter, fetal nutrition and excretion will be obstructed, which will easily lead to the occurrence of fetal low birth weight, resulting in intrauterine asphyxia and death. Pregnant women are advised to undergo regular checkups, ultrasound and other screening tests, and seek medical advice if they feel unwell.