Scientists have discovered that infertile women who are forced to use donor eggs do still pass their own DNA to their child.
It has been hailed as 'an amazing discovery' by Nick Macklon, professor of obstetrics and gynaecology at the University of Southampton.
It was previously believed that the fertilised egg used to make the embryo only had DNA from the father and donor mother.
Professor Macklon told the British Newspaper: 'One sadness infertile women experience is that their child has none of their genetic information.
'This research shows in principle the baby will have some DNA from her even though the egg is from another woman.
This seems to influence the way the baby develops.