San Diego: When 'Saybie' was born, she weighed about the same as an apple.

Believed to be the world's tiniest surviving micro-preemie, Saybie weighed just 245 grams when she was born in December at a San Diego hospital.

She was born 23 weeks and three days into her mother's 40-week pregnancy. Doctors told her father after the birth that he would have about an hour with his daughter before she died.

"But that hour turned into two hours, which turned into a day, which turned into a week," the mother said in a video released by Sharp Mary Birch Hospital for Women & Newborns on Wednesday, US time.