Membranous structure in amniotes, within which the embryo and fetus develop.
Note: It consists of a thin but tough, transparent pair of membranes, the
amnion and
chorion, that hold the developing embryo (and later
fetus) until shortly before
birth.
Source: PAC, 2016,
88, 713. (
Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 721 [
Terms] [
Paper]