abstract: Maternal cigarette smoking and marijuana use during pregnancy are risk factors that can adversely affect offspring. Although a large body of empirical literature has examined the adverse health effects of maternal cigarette smoking and marijuana use during pregnancy, few studies have looked at criminological factors associated with prenatal cigarette smoking and marijuana use. This thesis uses strain theory and social learning theory to explain a number of underlying mechanisms behind why some pregnant women decide to smoke tobacco and marijuana cigarettes during pregnancy. Previous drug involvement before pregnancy is also used to determine if it is a predictor of maternal cigarette smoking during pregnancy. Logistic regression was used to analyze data collected from the 1988 National Pregnancy and Infant Health Survey. This data set consists of information gathered from three different national samples of maternal and infant data occurring in 1988, which included 13,417 live births, 4,772 fetal deaths, and 8,166 infant deaths. The mothers in the sample were mailed questionnaires. Results showed that pregnant women who have unexpected pregnancies and experience financial hardship during pregnancy are more likely to smoke cigarettes and use marijuana during pregnancy, which is consistent with the general strain theory. Results also indicate that pregnant women who live in households with other people who smoke are more likely to smoke cigarettes during pregnancy, which may be explained by social learning, and that women who use illegal drugs are less likely to smoke cigarettes during pregnancy, even after controlling for strain and social learning. The practical and theoretical implications for this research are discussed. / Dissertation/Thesis / M.S. Criminology and Criminal Justice 2014