Babies conceived through medical procedures used in fertility clinics are two to four times more likely to have certain birth defects than infants conceived naturally, according to a new study. The defects include heart problems, cleft lip, cleft palate and abnormalities in the esophagus or rectum, according to the report from the Centers for Disease Control and Prevention. More than 14,000 women were included in the study, of which 281 used fertility treatments. The study did not include twin and multiple births or women who took fertility drugs but did not have medical procedures. It also did not address whether the results were due to the procedures themselves, or the population of people who seek out fertility treatments. [New York Times, Chicago Tribune]