than 1% (110 in 16,675) had diagnosed cerebral palsy. Epidemiology Rates of umbilical cord prolapse ranges from 0.1 to 0.6% of all pregnancies. This rate has remained stable over time. A recent study estimates 77% of cord prolapses occur in singleton pregnancies (where there is only one baby). In twin pregnancies, cord prolapses occur more frequently in the second twin to be delivered, with 9% in the first twin and 14% in the second twin. References External links Medical emergencies Complications of labour and delivery Wikipedia medicine articles ready to translate