Ann Keen has helped defeat a bid to ban so-called 'Frankenstein science'.
The Brentford & Isleworth MP voted against plans to ban hybrid human animal embryos, which were defeated by 336 to 176 in a free vote on Monday.
She also opposed a motion to ban 'saviour siblings' - children created to aid a sick brother or sister - which failed by 342 votes to 163 during the debate on embryo research.
Her husband, Feltham & Heston MP Alan Keen, did not vote on either issue.
Supporters of the research include Prime Minister Gordon Brown and Tory leader David Cameron and claim it is vital to help develop treatments for diseases like cancer and Alzheimer's. But opponents have accused scientists of playing God and insist little evidence exists of any medical benefits.