For most women, pregnancy is a time of great joy, excitement and anticipation. Unfortunately, for many it can also be a time of serious sleep disturbance, even for women who have never had problems sleeping. In fact, according to the National Sleep Foundation's 1998 Women and Sleep poll, 78% of women report more disturbed sleep during pregnancy than at other times. Many women also report feeling extremely fatigued during pregnancy, especially during the first and third trimesters. Considering the physical and emotional demands of pregnancy and the prevalence of sleep disorders among pregnant women, it’s no wonder that expectant mothers become so tired.