A woman has given birth after surgeons restored her fertility by implanting ovary tissue taken when she was a child.

The 24-year-old is thought to be the first in the world to have a baby after having an ovary frozen before the onset of puberty.

Moaza Al Matrooshi, who gave birth in London, said the arrival of her baby son was "like a miracle".

The UK breakthrough will give hope to thousands of other girls who are unable to conceive because their reproductive organs have been damaged by treatment for cancer and other diseases.