Edith Madoc-Jones weighed 580g when she was born at just 23 weeks and four days gestation.
Her mother, Nicola, had gone into hospital three days earlier, showing the early signs of labour. Doctors at the University Hospital of Wales did everything possible to delay the birth, but said the chances of the baby surviving were slim.
When Edith was born, her eyes were still fused together. She was so tiny there were no nappies small enough to fit her.
Edith was put on a ventilator and given multiple blood transfusions to keep her alive in the early weeks. At ten days old, she developed a lung infection - doctors told Nicola and David they might have to switch off her life support.
But remarkably, Edith pulled through. Now almost 17 months old, she is crawling, waving and starting to talk - reaching all the milestones for a child her age.
Nicola says she was 'amazed' by the dedication of the staff on the unit. Edith's middle name, Carmen, was chosen as a tribute to a midwife who helped throughout their stay.
Edith and her family received support from The Noah's Ark Children's Hospital Charity.