Doctors test womb surgery to save babies with underdeveloped lungs

This study is testing a fetal surgery procedure for babies with a severe form of congenital diaphragmatic hernia (CDH), a birth defect where abdominal organs push into the chest and stunt lung growth. Doctors temporarily place a tiny balloon in the baby's airway while still in the womb to block fluid, which may help the lungs grow larger before birth. The goal is to improve survival chances for these high-risk infants, who face life-threatening breathing problems at delivery.