Doctors in Florida successfully removed a baby from the womb at 25 weeks gestation from a fatal lung condition called congenital high airway obstruction syndrome (CHAOS), a condition that causes overinflated lungs and a compressed heart. The procedure saved the child's life, with doctors performing an unprecedentedly early operation where they partially removed him from his womb and placed him back in the womb. The doctors hope this approach will continue to save others in the future. The condition was diagnosed during a second-trimester ultrasound at Orlando Health Winnie Palmer Hospital for Women & Babies. The blockage in Cassian's widepipe was a 0.2-inch-thick membrane, which was too large to puncture using a minimally invasive laser probe. Doctors used general anesthesia to sedate the mother and child, but the general effects of general anesthesia on the developing fetus can lead to cognitive issues and potential cognitive issues.