The All Our Families (formerly All Our Babies) Cohort is a longitudinal pregnancy cohort that enables the investigation of the relationships between parental well-being and outcomes for children and families. This cohort also provides us with contemporary information about children growing up in an urban setting. All Our Families participants have provided information about mental health, lifestyle, neighborhood, pregnancy, parenting, child development, family life, recreation, screen time, sleep and use of services. This information will help us identify how what happens early can influence later health and development outcomes for children and families.