(CNN)An Alabama boy is just a little over 1 year old but already holds a Guinness World Record for his remarkable birth.
Michelle Butler was five months pregnant with twins when she was rushed into emergency labor at the University of Alabama at Birmingham (UAB) Hospital, and on July 5, 2020, her babies were born, four months ahead of their due date.
Only one baby, Curtis, survived. His sister, C'Asya, was much less developed and passed away one day later due to complications.
On Wednesday, Curtis was given the title of the world's most premature baby to survive by Guinness World Records. November 11 would have been his due date and the milestone coincides with Prematurity Awareness Month.
"Survival at this gestational age has never happened before, so before Curtis was born his chances of survival would have been far less than 1%," Dr. Colm Travers, assistant professor at UAB's Division of Neonatology, said in a statement to Guinness World Records.
A full-term pregnancy is about 40 weeks, but the twins were born at just 21 weeks and 1 day of gestation.
Curtis weighed just 14.8 ounces at birth, which is similar in weight to a soccer ball, according to UAB. He was put on constant treatment and grew stronger each day.
The hospital reported he was not only on a ventilator for three months following the birth, but stayed in there for 275 days with around-the-clock care.
"Numbers show that babies born so young have little to no chance of survival," said Dr. Brian Sims, the attending physician for the delivery. "We typically advise for compassionate care in situations of such extremely preterm birth."