What is another word for amnion?
Pronunciation: [ˈamni͡ən] (IPA) 
Amnion is a protective sac that surrounds the fetus during pregnancy. When searching for synonyms, some of the words that can be used are fetal membrane, chorion, embryonic sac, and gestational sac. The fetal membrane is the thin layer that lines the amniotic sac, while the chorion is the outer layer that attaches to the placenta and helps with its formation. The embryonic sac, on the other hand, is the general term used to refer to the amnion and chorion together. Lastly, the gestational sac is used to refer to the entire sac that contains the fetus, amniotic fluid, and placenta. These synonyms are interchangeable, with each one referring to the same protective structure that envelops the developing baby.
