By David Derbyshire
Last updated at 9:50 AM on 25th November 2009
A chemical produced naturally in women’s bodies during pregnancy offers hope as a powerful breast cancer drug, scientists say.
Alph-fetoprotein, or AFP, seems to halt the growth of existing tumours and prevent new ones from appearing, a study found.
Although experts stress the findings need to be repeated in human tests, they believe the molecule could eventually be converted into a breast cancer drug.