“…Snoring and SDB could be due to progressive gestational weight gain, nasopharyngeal edema through high estrogen levels which are highest in the third trimester [26], decreased functional reserve capacity and increased arousals from sleep [27]. However, pregnancy is also associated with changes which may offer protection against sleep apneas such a decrease of REM sleep [6, 16, 28] and, as we observed in our population, a preference for lateral sleep posture [29]. The detection of snoring is of utmost importance, since it could be correlated with hypertension [23, 30, 31], pre-eclampsia [8, 9], and even growth retardation of the fetus [9, 26, 32] with lower mean Apgar scores [9].…”