Baker C A, Hendrickx A G
Folia Primatol (Basel). 1977;27(3):230-3. doi: 10.1159/000155788.
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.
通过大体和组织学检查确定了40只未存活的松鼠猴胎儿和新生儿脐带中的血管数量。72.5%的脐带中有四条脐血管，27.5%的脐带中有三条血管。同时记录了胎儿畸形情况。
