About half the pregnancies in the United States each year are accidental. Unintended pregnancies keep women out of the workforce and prevent many people from continuing their education and improving their economic state. This paper investigates the factors that influence young adults’ knowledge of pregnancy prevention through data collected and organized by the Guttmacher Institute. This investigation takes into account types and sources of sex education, levels of general education, race and ethnicity, income, gender, age, religion and pregnancy history. The results show that contraceptive sex education is more effective than abstinence-only or abstinence-focused sex education. Women have much higher levels of pregnancy prevention knowledge than men and both black and white young adults have higher pregnancy prevention knowledge levels than other races. Higher education levels are also correlated with greater pregnancy prevention knowledge. Additionally, people who have been pregnant or whose partner has been pregnant in the past have a higher level of pregnancy prevention knowledge. Source of sex education, income, age, and religion did not have any significant effect on pregnancy prevention knowledge.