Joan Morris, professor of medical statistics at Queen Mary University, says that the rate of birth defects has stayed "pretty much the same" and is similar to that of Europe.
Overall, our impression is that we're pretty similar to Europe although we have higher rates of abdominal defects, particularly among younger mothers.
People feel this is lifestyle related. Evidence suggests that risks are increased, particularly in lower body mass index mums - the thinner teenage pregnancies - but we can't say that's definitely the cause.
We also have higher rates of neural tube defects than other countries but it's not exactly clear why.
More top news
Uber has been branded a "disgrace" by shadow chancellor John McDonnell after the firm lost its licence to operate in London.
Angela Merkel is shaping up to win a fourth term as German chancellor - extending her 12-year stay at the top of the Bundestag.
Cambridge once again beat rival Oxford in the Good University Guide league table while Lancaster was named university of the year