The primary objective of the 2007 Indonesia Young Adult Reproductive Health Survey (IYARHS) is to provide policymakers and program managers with national-level and provincial-level data on knowledge, attitudes, and practices of young adults regarding human reproduction, relationships, HIV/AIDS, and sexuality. Specifically, the 2007 IYARHS was designed to: • Measure the level of knowledge of young adults about reproductive health issues • Examine the attitudes of young adults on various issues in reproductive health • Measure the level of tobacco use, alcohol consumption, and drug use • Measure the level of sexual activity among young adults • Explore young adults’ awareness of HIV/AIDS and other sexually transmitted infections.