Whether or not the umbilical cord can come back on its own depends on the month of pregnancy and the number of weeks it has been wrapped.
In mid-pregnancy, the fetus is small and can usually come back after a week of wrapping. If the cord is wrapped around two or more times in mid to late pregnancy, it is less likely to come back. In late pregnancy, especially after thirty-six weeks, it is less likely to come back.
If the umbilical cord is found to be wrapped around the neck in mid-pregnancy, most of the time it can come back on its own due to the small size of the fetus, the large amount of amniotic fluid and the greater mobility of the fetus in the uterus. In late pregnancy, especially after 36 weeks, the fetus is larger and has less mobility in the uterus, which makes it difficult to wind the cord back.
If the umbilical cord is wrapped around the neck one time, it will have less effect on the fetus during delivery. If the umbilical cord is wrapped around the neck twice and the umbilical cord itself is relatively short, it will affect the entry of the fetus into the pelvis.
If the umbilical cord is found to be wrapped around the neck, and if there is any abnormal movement of the fetus, it is necessary to consult a doctor in time to avoid delaying the condition.