Abnormality of the umbilical cord Umbilical cord prolapse 2024-02-11T16:45:08Z The presence of the umbilical cord (UC) between the fetal presenting part and the cervix, regardless of the membrane status (intact or ruptured). Descent of the UC through the cervix is essential for diagnosing cord prolapse. It can be either overt (past the presenting part) or occult (alongside the presenting part).