IVF children more prone to asthma

Children conceived through in vitro fertilisation are more likely to have asthma, a large study finds.

The study of more than 2.5 million Swedish children found that those born after IVF were 28% more likely to have asthma in childhood than those conceived naturally.

However, the absolute risk of asthma was still small, rising from 4.4% of children conceived naturally to 5.6% of those conceived with IVF.

Although the study couldn’t determine the mechanisms behind the link, the authors suggested parental asthma could be associated with an increased risk of subfertility.