Babies conceived through assisted reproductive technology are more likely to be born with a major heart defect, new research shows.

The birth defects were more likely, but still very uncommon, in infants conceived through certain fertility treatments, a large study found.

Some congenital heart defects are life-threatening. The increased risk is especially pronounced with multiple births, which are more common in assisted reproduction. "Previous research shows that there are increased risks for babies conceived with the help of assisted reproductive technology,