Growing Up in Scotland (GUS) is a longitudinal research study that tracks the lives of thousands of children and their families from the early years, through childhood and beyond. Launched in 2005, GUS has collected information on three nationally representative cohorts of children born in 2004-05 (Birth Cohort 1), 2002-03 (Child Cohort) and 2010-11 (Birth Cohort 2). This page provides information about Birth Cohort 1 (BC1). The main aim of the study is to provide new information to support policymaking in Scotland, but it is also intended to provide a resource for practitioners, academics, the voluntary sector and parents.