This document provides background information on a proposed study to examine determinants of risky sexual behavior and contraceptive use among unmarried youth in Obafemi Awolowo University, Osun State, Nigeria. It discusses how youth are defined and their risk-taking behaviors. Rates of premarital sex, STIs, and teenage pregnancy in Nigeria are presented. The document outlines research questions regarding knowledge of risky behaviors, factors influencing such behaviors and contraceptive use, and the relationship between behaviors and contraception. The study aims to understand the magnitude of risky behaviors and their drivers, assess knowledge and factors related to risky sex and pregnancy, examine influences on contraceptive preferences, and determine the link between behaviors and contraceptive use among