2. Amniotic constriction bands
Amniotic constriction bands are strands of fluid-filled sacs that surround a baby in the womb. They may cause a congenital (present from birth) deformity of the arms, legs, fingers, or toes.
www.uhseast.com

3. Amniotic constriction bands - Overview
Amniotic constriction bands are strands of the fluid-filled sac (amniotic sac) that surrounds a baby in the womb. They may cause a congenital (present from birth) deformity of the face, arms, legs, fingers, or toes.
www.umm.edu