Born in the Witten, west Germany, measuring just 22 centimetres and weighing a mere eight ounces, it was feared she would not survive.
But the girl, labelled 'the little fighter' by doctors treating her, astonished everyone and is thriving.
She now weighs in at 7lb 2oz - a healthy weight for a newborn. Local reports say it makes her the lightest premature baby in the world to survive.
The previous record is thought to be held by Rumaisa Rahman, who was born in the Loyola University Medical Centre in of Chicago when her mother was 25 weeks pregnant. At birth, she was eight inches tall and weighed 8.6 ounces.
Dr Bahman Gharavi, head of children and youth clinic at St Mary's hospital in Germany, said Emilia's survival was miraculous.
He said the joint effort of paediatricians, gynaecologists and paediatric surgeons as well as Emilia had made it possible.
'Even children with a birth weight of 14 ounces rarely survive. We have to thank Emilia as well for her own survival,' he said.
'She is a little fighter.