Conclusion
Our cohort study is among the first to show the correlation between sleep and blood pressure throughout pregnancy in the population without pre-existing hypertensive disorder. Most significant correlation was found in the first trimester. Uterine artery doppler was worse in poorer sleepers suggesting a potential association between sleep and placental function which may affect blood pressure. Future studies should focus on interventions to improve sleep antenatally with an effort to optimize blood pressure and pregnancy outcome.