The number of umbilical vessels in the squirrel monkey (Saimiri sciureus)

The number of vessels present in the umbilical cords of 40 nonsurviving squirrel monkey fetuses an neonates has been determined by gross and histologic examination. Four umbilical vessels were present in 72.5% of the cords and 27.5% contained three vessels. Coincident fetal malformations are noted.