The Umbilical Cord and Complications of Twin Gestations | Maternal-Fetal Medicine
Umbilical Cord Stricture is Not a Genetic Anomaly: A Study in Twins - José I. Rodríguez, Adrián Mariño-Enríquez, Judith Suárez-Aguado, Pablo Lapunzina, 2008
Twins baby hospital hi-res stock photography and images - Alamy