Past month (suggesting recent) substance abuse for pregnant and non-pregnant women ages 15-44 reveals some important differences that indicate changes for some women during pregnancy.  For the three categories of substance use (cigarettes, binge alcohol, and illicit drugs), the rates of reported recent use were substantially higher for non-pregnant women than for pregnant women.  Non-pregnant women were almost twice as likely to report past month cigarette use than pregnant women, although nearly 1 in 5 pregnant women smoke.  Binge alcohol use (drinking five or more drinks on the same occasion), reported by 19.9 percent of non-pregnant women, was more than 5 times higher than the 3.9 percent of pregnant women who reported binge alcohol use.  Illicit drug use in the past month was more than twice as likely to be reported by non-pregnant women (7.7 percent) compared to pregnant women (3.3 percent).