amniotic

/ˌæmniˈɑtɪk/
adjective
  1. Relating to the amnion, the thin membrane that surrounds a developing fetus in the womb.
    • The amniotic membrane protects the baby during pregnancy.
    • Doctors examined the amniotic tissue for any signs of infection.
    • The amniotic sac is filled with fluid that cushions the fetus.