In May 2008 in the abortion amendments to the Human Fertilisation and Embryology Bill (now Act), David Heyes voted to keep the current time limit of 24 weeks in line with the scientific and medical consensus.
In February 2015 David Heyes voted in favour of allowing mitochondrial donation, which would allow women who carried mitochondrial diseases to give birth to children who would not inherit the disease. An October 2014 briefing report by the Human Fertilisation and Embryology Authority (HFEA), which had been investigating the issue for three years, stated that there was no evidence to show that mitochondrial donation was unsafe. However, some religious groups had said that such procedures should not be allowed. After clearing both Houses mitochondrial donation is now legal, regulated by the HFEA.
Libel Law Reform
In January 2010, David Heyes signed Early Day Motion 423 calling for a reform of the English libel law. The motion noted that human rights activists, scientists, writers and journalists are currently prevented from publishing, and the public prevented from reading, matters of strong public interest due to the chilling effect of the law.
In November 2010, David Heyes signed Early Day Motion 767: Science is Vital Campaign. The motion stated that the house "believes that continued investment in research is vital in order to meet the technological and social challenges of the 21st century, and to continue to attract high-tech industries to invest here; further believes that large cuts to science funding are a false economy, due to evidence that research investment fuels economic growth".