Trends in marijuana use among pregnant women with and without nausea and vomiting in pregnancy, 2009-2016.


Division of Research, Kaiser Permanente Northern California, 2000 Broadway, Oakland, CA 94612, USA; Department of Psychiatry, University of California, San Francisco, 401 Parnassus Avenue, San Francisco, CA 94143, USA. Electronic address: [Email]


Cross-sectional studies indicate an elevated prevalence of prenatal marijuana use in women with nausea and vomiting in pregnancy (NVP). However, it is unknown whether differences in marijuana use by NVP status have persisted over time as marijuana becomes more acceptable and accessible and prenatal use increases overall. We compared trends in prenatal marijuana use by NVP status in the first trimester of pregnancy using data from Kaiser Permanente Northern California's (KPNC) large healthcare system.


Cannabis,Longitudinal,Marijuana,Morning sickness,Nausea and vomiting,Pregnancy,