The study is new, and he said CDC hasn't issued guidance on the prevention benefit of antiretroviral therapy.

WSJ: AIDS Study Marks Prevention Breakthrough With Antiretroviral Drugs

"Following the publication of a US study into birth defects, HFEA's scientific and clinical advances committee reviewed our guidance and advice about the risks of treatment, " he said.

BBC: New guidance on IVF defects risk

The petition also calls on a study of the extent to which the recommendations of the Stewart Report Stewart Report and the planning guidance have been complied to.

BBC: Public Petitions Committee