A study of 1,673 pregnant women in their third trimester found that 9 percent reported chronic snoring before and during pregnancy, which was a risk factor for elective cesarean delivery (odds ratio = 2.25) and small-for-gestational age (OR = 1.65). Another 26 percent of participants reported pregnancy-onset snoring, which was associated with emergency cesarean delivery (OR 1.68). According to the authors, the study supports the importance of screening pregnant women for symptoms of sleep-disordered breathing. The results are published in the Nov. 1 issue of the journal SLEEP.