Agrawal A, et al. – In this study, researchers examined the use of alcohol, cigarettes, and cannabis in pregnant women between 2002 and 2016. The adjusted prevalence of past 30-day cannabis use in pregnant women aged 18 to 44 years rose from 2.37% in 2002 to 3.85% in 2014, according to the National Survey of Drug Use and Health. In another study, investigators found that the increase from 4.2% in 2009 to 7.1% in 2014 was relatively similar. Corresponding rates of alcohol use (eg, 11.2% from 2001 to 2005 vs 10.2% from 2011 to 2013) and cigarette smoking (eg, 13.3% in 2002 vs 12.3% in 2010) have generally decreased during pregnancy. Overall, these reports call for more detailed characterization of patterns of substance use during the pregnancy course.