| Syncytiotrophoblast | |
|---|---|
 Primary chorionic villi. Diagrammatic. | |
 Secondary chorionic villi. Diagrammatic. | |
| Details | |
| Carnegie stage | 5a |
| Days | 8 |
| Identifiers | |
| Latin | syncitiotrophoblastus |
| TE | E6.0.1.1.4.0.2 |
| FMA | 83040 |
| 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.