Main findings
The principal objective of our study was to evaluate the prevalence of OSA in a population of pregnant women with a BMI >35 kg/m2. In this high-BMI population at risk, we found a prevalence of 43.3% (n=29) with OSA mild or moderate in 25 women and severe in 4. The women with OSA developed gestational diabetes during pregnancy more often than the others. They were older and had more maternal comorbidities before pregnancy, a higher BMI (43.8 ± 6.2 kg/m2), and more frequent chronic hypertension.