Amillia Sonja Taylor, born Oct. 24 after just less than 22 weeks in the womb, will spend a few extra days in the hospital as a precaution.
Amillia, now a relatively robust 4½ pounds, was about to be released from Baptist Children's Hospital in Florida, but today doctors unexpectedly decided to postpone her release.
A hospital spokeswoman told The Associated Press that she did not have details on why doctors had changed their minds about sending Amillia home.
On Monday, Amillia was between 25 and 26 inches long, doctors said. She was 9½ inches long and weighed 10 ounces at birth.
Amillia is the youngest surviving premature baby, born after just 21 weeks and six days in the womb.
The only known premature babies that have survived so young prior to her were all born at 23 weeks. The average pregnancy is between 37 weeks and 40 weeks long.
Her parents, doctors and caretakers joined "Good Morning America" Monday to discuss Amillia's amazing recovery. Her parents expected her to be released from the hospital today. "I'm overjoyed to be able to take her home," Amillia's mother, Sonja Taylor, told "GMA."