Using transplanted ovarian tissue frozen at the time when a woman was a child, medical team has helped her give birth to a child. The woman is in Belgium has given birth to a healthy baby.

The girl was 14 years old when she was diagnosed with acute anemia and required a treatment that could damage her ovaries. Before starting the therapy, the doctors had removed and frozen her right ovary in fragments with a hope that it could be used in future if she wanted to become mother.

After 10 years, doctors in Belgium re-implanted the fragments and she delivered a healthy baby boy last November. There have been many instances where babies have been born from tissue taken from adult women.

But it has happened for the first time that the success has been achieved with tissue removed before the girl attained puberty. Isabelle Demeestere at Erasmus Hospital at Brussels Free University said, "This is an important breakthrough in the field because children are the patients who are most likely to benefit from the procedure in the future".

Isabelle said that when children are diagnosed with diseases that need treatments that can damage ovarian function then doctors have no other option but to freeze ovarian tissue in order to preserve their fertility.

Doctors said that the girl needed to undergo a bone marrow transplant. She required chemotherapy or radiotherapy and had to continue with immunosuppressive drugs for 18 months that damaged her left ovary.

After a decade, the woman, who wants to remain anonymous, wanted to have family. Re-implantation of ovarian fragments helped the woman to become mother.