Syncytiotrophoblast

Syncytiotrophoblast
Primary chorionic villi. Diagrammatic.
Secondary chorionic villi. Diagrammatic.
Details
Carnegie stage5a
Days8
Identifiers
Latinsyncitiotrophoblastus
TEE6.0.1.1.4.0.2
FMA83040
Anatomical terminology

The syncytiotrophoblast (from the Greek 'syn'- "together"; 'cytio'- "of cells"; 'tropho'- "nutrition"; 'blast'- "bud") is the epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother. It is a multinucleate, terminally differentiated syncytium, extending to 13 cm.