Miracle Baby: Heart Surgery Before Birth Saves Baby's Life

medical story, tonight one family is celebrating the holidays with a baby they thought would not be here. This is a medical miracle. before the child was even born. Here's dr. Richard besser.... See More

medical story, tonight one family is celebrating the holidays with a baby they thought would not be here. This is a medical miracle. before the child was even born. Here's dr. Richard besser. Reporter: What you're seeing is a miracle in motion. Just a few minutes old. You would never guessed that this baby had been through an operation on its heart months before, while still in his mother's womb. 20 weeks pregnant, she received devastating news. She was carrying a fetus that had absence of development of left side of the heart. Reporter: The doctors at children's hospital in philadelphia, wanted to perform an operation of his unborn heart, just the size of a grape. We held on to that little glimmer of hope maybe, there's an expermital procedure that would give him hope. We just thought that there has to be a first. There's a first for everything. And maybe he'll be it. Reporter: On this ultrasound you're seeing the actual needle pass through mom's belly into his heart where doctors inserted a tiny stent. Doctors won't know how successful they were until three months later when he was born. Every cry, a welcome sound. And remember how we told you that no chng this surgery had lived to 1, take a look at this. ♪ Happy birthday ♪ Reporter: What are your dreams for him? Grow up and hopefully have a family of his own. Yeah, ke the rest of us. Reporter: A little fighter lookiing forward to many more birthdays. Dr. Richard besser, abc news, east greenville, pennsylvania. Extraordinary.