Women who begin snoring during pregnancy are at strong risk for high blood pressure and preeclampsia, according to research from the University of Michigan.
"We found that frequent snoring was playing a role in high blood pressure problems, even after we had accounted for other known risk factors," says O'Brien. "And we already know that high blood pressure in pregnancy, particularly preeclampsia, is associated with smaller babies, higher risks of pre-term birth or babies ending up in the ICU."
Habitual snoring, the hallmark symptom of sleep-disordered breathing, was defined as snoring three to four nights a week. About 25 percent of women started snoring frequently during pregnancy and this doubled the risk for high blood pressure compared to non-snoring women.
O'Brien writes that these results suggest that up to 19 percent of hypertensive disorders during pregnancy might be mitigated through treatment of any underlying sleep-disordered breathing.
Pregnant women can be treated for sleep-disordered breathing using CPAP (continuous positive airway pressure).
Hypertensive disorders of pregnancy are a leading global cause of maternal and infant deaths... [emphasis mine]
Image from Snoring and Pregnancy Gestational Diabetes
where it says
...women who reported frequent snoring during their pregnancy were more likely to develop gestational diabetes -- a condition than can cause health problems for the mother and baby.