The embryo had been cryopreserved in May 1994, when its adoptive mother Lindsey Pierce was four and father was three. 'We didn’t care about the age or ethnicity of the embryo,' she said. 'We just wanted to give a baby a chance.'
Scientists from the United States and England shared their work in two studies published in the journal Nature. Other scientists in Israel and China published studies on their work earlier this month that have not yet been reviewed by peers.