A medical online manual that introduces and describes various sexually transmitted infections.
The Body is the comprehensive HIV resource with topics on HIV testing, prevention, myths, blood donation, and how HIV works and is treated. There are galleries, forums and chats for discussions of topics and to get questions answered.
A wealth of information on diverse issues of adolescent health from the AMA.
A comprehensive resource on all things dealing with women's health and health issues, aimed at women and medical professionals. While there is lots of technical information, the site offers a wiki, forums and more.
Puberty 101 offers many links and resources to teens designed to answer questions about puberty and sexual health, but also about issues such as drug abuse and mental health.
MTV gets on the sexual health train by providing youth with information about preventing pregnancy, STDs and testing, and relationship issues. Each section is full of links, infographics, and resources for taking action, including finding a testing center near you and ways to become a GYT (Get-Yourself-Tested) advocate.
Planned Parenthood offers clinics and facilities across North America and internationally to provide low- or no-cost sexual and reproductive health examinations, birth control and STI screenings.
Supported by the American Social Health Association, iwannaknow.org is a search function that allows youth to easily search topics of interest to them. Primarily devoted to preventing the transmission of STIs, there are also topics on puberty, love and relationships, and reproductive information.