Trajectories of maternal distress and risk of child developmental delays: Findings from the All Our Families (AOF) pregnancy cohort.

•Children of mothers experiencing subclinical and high anxiety symptoms in pregnancy and early parenting years had increased risk of delays in communication and personal-social development.•Children of mothers experiencing postpartum depression had increased risk of delays in their personal-social development.•Identifying and supporting mothers having postpartum depression and subclinical and high anxiety symptoms may mitigate the associated child developmental delays.