Cord presentation or prolapse occurs when the umbilical cord descends through the birth canal before or with the fetus. This can compromise blood flow through the cord and oxygen to the fetus. The document discusses definitions, types, risk factors, diagnosis, and management of cord presentation and prolapse. Management involves preventing cord compression, assessing the fetus, and prompt delivery, usually via emergency cesarean section within 30 minutes for overt prolapse or if vaginal delivery is not imminent. Fetal and neonatal care is also important given the risks of hypoxia.