Biobag, an artificial womb allows a premature lamb to continue its development. The Biobag is a kind of plastic bag that simulates a uterus. The lamb is in a solution of electrolyte, similar to the amniotic fluid, which protects it from the outside world. The Lamb receives its supply of nutrient and oxygen through a tube connected to the umbilical cord. The Biobag has been tested successfully on premature lambs who were able to grow normally inside the bag for 4 weeks. The scientists and doctors hope one day that the Biobag can help premature human babies.