It’s in the early stages of development. Scientists have created artificial wombs for lambs that could help save the lives of premature human babies. Researchers were able to continue gestation of premature lambs in Biobags, external artificial wombs, for a record-breaking four weeks, with normal development of their brains, lungs and other organs. With 30,000 critically preterm human births in the U.S. each year, extreme prematurity is the leading cause of neonatal death and disease. Researchers say Biobags could be ready for human trials within three years.