Physiological Changes in Pregnancy
Amnion is seen on? (AIIMS Nov 2010)
Amnion is the innermost fetal membrane. It is a thin, transparent sac that holds the fetus suspended in the liquor amnii. The amnion grows rapidly at the expense of the extraembryonic coelom, and by the end of the 3rd month it fuses with the chorion, forming the amnio chorionic sac.