Relations between reckless behaviour and sexual practices of emerging adult women (ages 18-25) within a social cognitive theoretical perspective were examined. In addition, relations between self esteem, sexual attitudes and sexual behaviour were also examined. The Sexual Experience Inventory, Rosenberg Self-Esteem Scale, Hendrick Sexual Attitude Scale, and the Reckless Behaviour Questionnaire were administered to 364 undergraduate college women with a mean age of 19.8 years. With implications for further research and health education, findings indicated that emerging adult women engaged in a broad range of sexual behaviour that was predicted by the level of their reckless behaviour and sexual attitudes including sexual practices and permissiveness. (Contains 5 tables.)