BOSTON (CNN) -- In Boston, a set of twins born 24 days apart are healthy, thanks to the efforts of doctors who performed a rare surgery to save both children.
They are twins, but they don't share a birthday. In fact Alexandre is more than three weeks older than his brother Ronaldo, but both boys are thriving after a rare and risky delayed delivery that has exceeded every expectation.
The challenge began when mom Linda DaSilva went into labor only 24 weeks into her pregnancy. Doctors at tufts tried to stop the contractions, but four days later, a very premature Alexandre was born. She said, "We were praying to hear his cry, and we did and it was a relief because knew there was 50 percent chance of not surviving."
Doctors here placed baby number one in intensive care and told mom and dad it was time to consider keeping baby number two in mom's womb a little longer. Linda said, "I thought it was absurd! I said I don't think, I didn't know this was possible."
But doctors explained a "delayed twin delivery" could be done and Linda was a perfect candidate. Linda said, "He's like leave him there- he is fine-- his heart is beating well-- so okay- then we start praying."
A healthy Ronaldo would be born 24 days later weighing in a full pound more than his big brother. Dr. Gina Geis said, "We try to tell moms be grateful for everyday you're still pregnant and we can get you as far along as we possibly can and this is just a perfect example."