Does sleep influence weight gain during pregnancy? A prospective study

Objective: The focus of this study was to evaluate the associations between subjective sleep quality and duration and weight gain during pregnancy. Methods: A prospective and longitudinal study was conducted with 63 pregnant women. Pregnant women were evaluated at the first, second and third trimester for subjective sleep quality (Pittsburgh Sleep Quality Index [PSQI]) and anthropometric variables for body mass index [BMI] calculation. The sleep quality was grouped per cluster, identifying those individuals who maintained, improved or worsened their sleep quality, based on the PSQI classifications. Generalized estimating equations (GEE) were used to examine the association between sleep and BMI over the pregnancy period. Results: An effect of the interaction between time of pregnancy and clusters of sleep quality was observed on the BMI (p