Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
This is Archived Content. This content is available for historical purposes only. It may not reflect the current state of science or language from the National Institute on Drug Abuse (NIDA). View current news releases on nida.nih.gov.
A NIDA-funded study suggests that pregnant women who smoke both marijuana and cigarettes have a higher likelihood of smaller babies and increased maternal stress and aggression.
