Each year, about 30,000 American babies are born this early—considered “critically preterm,” or younger than 26 weeks. Before 24 weeks, only about half survive, and those who live are likely to endure long-term medical complications. “Among those that survive, the challenges are things we all take for granted, like walking, talking, seeing, hearing,” says Kevin Dysart, a neonatologist at the Children’s Hospital.
But within a decade or so, babies born between 23 and 25 weeks might not be thrust into the harsh outside world at all. Instead, they may be immediately plunged into a special bag filled with lab-made amniotic fluid, designed to help them gestate for another month inside an artificial womb. That is, if a new technology that has been successfully tested on lambs is found to work on humans.