A baby born at 21 weeks' gestation in Iowa City, Iowa, has celebrated his first birthday, earning a Guinness world record for being the most premature baby.

But in the last few weeks, this little fighter celebrated his first birthday and received his official designation as the world’s most premature baby from Guinness World Records. This isn’t a record that Nash’s parents,

Recognized by Guinness World Records as the most premature baby to survive, Nash’s story began with heartbreak. Just months before his birth, Mollie and Randall lost their daughter McKinley at 18 weeks gestation.