These guidelines contain recommendations on the identification and management of substance use and substance use disorders for health care services which assist women who are pregnant, or have recently had a child, and who use alcohol or drugs or who have a substance use disorder. They have been developed in response to requests from organizations, institutions and individuals for technical guidance on the identification and management of alcohol and other substance use and substance use disorders in pregnant women, with the target of healthy outcomes for both pregnant and their fetus or infant.