The American Social Health Association provides accurate, medically reliable information about sexually transmitted diseases (STDs) to the public, patients, providers, and policymakers. Its Web site has resources to answer your questions as well as to help you find referrals, join help groups, and get access to in-depth information about STDs. You can also get information over the phone by calling 1-800-227-8922.

The National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention is a branch of the Centers for Disease Control and Prevention (CDC). Their Web site provides information and updates on sexually transmitted diseases (STDs), human immunodeficiency virus (HIV), and tuberculosis (TB). You can also find fact sheets on these health topics.

The Planned Parenthood Federation of American provides comprehensive reproductive health care and consumer information about family planning, sexual health, and sexually transmitted diseases (STDs).

The Teen Talk Web site (www.plannedparenthood.org/teen-talk) has information for teens about dating, teen pregnancy, sexual orientation, gender identity, how teens can protect themselves against STDs, and more.

Sexuality Information and Education Council of the U.S. (SIECUS) develops, collects, and gives out information; promotes comprehensive education about sexuality, including sexually transmitted diseases; and advocates for the right of individuals to make responsible sexual choices.