Associations between mothers' and fathers' depression and anxiety prior to birth and infant temperament trajectories over the first year of life: Evidence from diagnoses and symptom severity

•Mothers' depression and anxiety prior to birth predicted temperament at 3 months.•In fathers, these predictors related to shifts in temperament across infancy.•Lifetime diagnoses and symptom severities predicted distinct temperament profiles.•These results have implications for mental health screening and early intervention.s