Alcohol, marijuana and tobacco should not be used while pregnant.  Below are several videos explaining the harmful impact they may have on an unborn child. 

Alcohol use while pregnant FAQ - English

Consumo de alcohol durante el embarazo - Español

Marijuana use while pregnant/ Consumo de marijuana durante el embarazo  - English & Español

Secondhand smoke while pregnant/Humo de segunda mano durante el embarazo - English & Español