Researchers examined associations between sleep, physical activity (PA), psychological health, and gestational weight gain (GWG) in 20 overweight/obese pregnant women participating in a 6-week weight-control intervention. Findings: sleep time was positively associated with PA and stress and negatively associated with depression; nap time was positively associated with psychological health. Number of times woke was negatively associated with GWG and positively associated with psychological health. Findings will inform development of sleep content for future interventions.