Stage of embryo development in which the two-layered blastula transforms into the gastrula by developing ectoderm and endoderm, as well as a third layer (mesoderm), through the movement of specific cells.
Source: PAC, 2016,
88, 713. (
Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 758 [
Terms] [
Paper]