Genetic tests have established that a white woman who gave birth to black twins after an unprecedented in-vitro fertilisation mix-up in Britain is their biological mother, a court said today.

A black man whose sperm might have been used by mistake instead of sperm from the woman's husband has also been identified.

The black man and his wife were receiving treatment at the same state-run fertility clinic, the court statement said.

The case has attracted a barrage of publicity since coming to light earlier this month, prompting the government to launch an investigation to find out how the mix-up occurred.