E cigs market to teens using big tobacco tactics New study shows common vape ingredients deform fetal mouse skulls. Even if they are nicotine free. Researchers at The Ohio State University, led by anatomist James Cray, exposed pregnant mice to the base Cigarette Smoke Exposure in Mice JoVE Journal Investigating Behavioral and Neuronal Changes in Adolescent Mice Following Prenatal Exposure to Electronic Cigarette (E Cigarette) Vapor Containing Nicotine