title: Two knots in the umbilical cord.
abstract: A case of two true knots occurring in an umbilical cord is reported because of its relative rarity. The literature is reviewed. The cause of this potentially dangerous phenomenon is discussed, and a recommendation for further study made.
mesh_terms: D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications; D014470:Umbilical Cord