Prevalence of abnormal sleep duration and excessive daytime sleepiness in pregnancy and the role of socio-demographic factors: comparing pregnant women with women in the general population

Highlights • Abnormal sleep duration and daytime sleepiness in pregnancy were investigated. • Pregnant women were 3× more likely to sleep ≤6 h and 1.9× more likely to sleep >9 h. • Abnormal sleep duration was more likely for Māori, unemployed, and night workers. • Pregnant women were 1.8 times more likely to report excessive daytime sleepiness. • Healthy sleep should be an important area of focus in maternity health care.