trophectoderm

https://doi.org/10.1351/goldbook.11326

Outer layer of the blastocyst that contacts the endometrium, establishes nutrition for the embryo, and differentiates into the trophoblast.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 816 [Terms] [Paper]