A<unk>  or cowl (, literally, "helmeted head") is a piece of membrane that can cover a newborn's head and face. Birth with a<unk>  is rare, occurring in fewer than 1 in 80,000 births. The<unk>  is harmless and is immediately removed by the parent, physician or midwife upon birth of the child. The "en-caul" birth, not to be confused with the "caul" birth, occurs when the infant is born inside the entire amniotic sac. The sac balloons out at birth, with the amniotic fluid and child remaining inside the unbroken or partially broken membrane.
Caul
Wart
Drustbed
Uinyeo
Squawk 
Jim 
Welt 
Nail 