The Observation Of Late Pregnant Women’s Sleep Structures In Xining

Aims:To objectively measure sleep structure and investigate the severity of sleep disordered breathing in the third trimester of pregnant women who lives in Xining.Methods:Thirty women in the late pregnancy and 30 non-pregnant control women took overnight polysomnography and completed questonaires regarding the sleep quality and mood.Results:Women in the late pregnancy have more stage 1 sleep,less stage3 sleep and less SWS sleep when compared to the control group.Pregnant women show differences in higher AHI,decreased mean SaO₂ and minimum SaO₂ from the control group.The time when pregnant women’s blood oxygen saturation dropped below 90%last longer than that of control group.Awakening index is higher among women in the third trimester of pregnancy and the figure for WASO also increased.Common complaints about sleep varied,such as going to toilet during night,having a hard time breathing,feeling hot and pain.Conclusions:It seems that frequent awakenings result in sleep fragments and decreased sleep efficiency.The pregnant women living in Xining often do not get enough oxygen and they may not breathe well.The reasons for awakening are so simple and controllable that pregnant women can sleep better by forming good living habits.