Human Interest Alabama Boy Makes New Record as World's Most Premature Baby to Survive, Mom Says He's 'Very Active' Curtis Means was born nearly 19 weeks early and weighed just 14.8 oz at the time of his birth By Greta Bjornson Greta Bjornson Twitter Digital News Writer, PEOPLE People Editorial Guidelines Published on November 11, 2021 11:35 AM Share Tweet Pin Email A baby in Alabama, who weighed less than a pound at birth, has been named the most premature baby to survive by Guinness World Records. Curtis Zy-Keith Means was born at 21 weeks at the University of Alabama at Birmingham hospital when his mother, Michelle "Chelly" Butler, underwent emergency surgery to deliver, according to Guinness. When Butler gave birth to her son on July 5, 2020, Curtis weighed just 14.8 oz, or 420 grams. Curtis' due date was originally set to Nov. 11 of that year, making him nearly 19 weeks early. Now, the 16-month-old is healthy and happy. After his birth, Curtis underwent treatment, responded"extraordinarily well," per Guinness, and made an "exceptional" recovery. Video Captures Tender Moment Mother Holds Premature Son for First Time Curtis' remarkable progress was bittersweet for Butler, who delivered twins — both Curtis and his sister, C'Asya — July 5. C'Asya was born less developed than her brother, and died one day after she was born, according to Guinness. Neonatologist Dr. Brian Sims helped treat Curtis and was on duty when Butler delivered the twins. He told Guinness, "The numbers say that babies at this age will not survive. Mom's question to me was: 'Can we give my babies a chance?' " Guinness World Records Shortly after Curtis was born, "He showed initially that he responded to oxygen, his heart rate went up, his numbers went up, " Dr. Sims said. "He was giving us a lot of positive feedback that… he wanted to survive." In his two-decade career, the doctor said he's never seen anything like Curtis' case. "I've been doing this almost 20 years… but I've never seen a baby this young be as strong as he was," Dr. Sims said, adding, "There was something special about Curtis." Anna Faris Says She 'Couldn't Stop Searching for Answers' After Son Jack's Premature Birth After 275 days spent in the hospital, Curtis was discharged in April. At home, Curtis' three older siblings help Butler out with the baby, feeding him and bathing him. Butler told Guinness her little boy is "very active," adding, "I'm tired already!" "I'm very proud of him because where he came from and where he at now, I can tell the difference," she said. Curtis beat out the previous record holder for most mature baby to survive, Richard Hutchinson, who weighed just 11.9 oz when he was born June 5, 2020.