An embryo frozen for nearly 25 years has become the first child for a woman who would herself have been only one when the baby was conceived, US media reported.

The embryo, donated by a family in the US, was thawed in March and transferred to mum Tina Gibson's uterus.

Emma Wren Gibson was born in November. She was conceived in October 1992 - a year and half after her mum's own birth. The 24-year-old embryo is believed to have been cryopreserved for longer than any other viable human embryo.

The embryo was provided by the National Embryo Donation Centre in the US. The organisation encourages couples who do not want additional children to donate unneeded embryos after their families are complete, so that other couples can try to become parents.

Tina and Benjamin Gibson turned to the Knoxville-based organisation after Mr Gibson, who has cystic fibrosis, was found to have fertility issues.
Neither parent is biologically related to their new daughter.