The American Association of Sexuality Educators, Counselors, and Therapists (AASECT) is a nonprofit professional organization that promotes understanding of human sexuality and healthy sexual behavior. AASECT offers certification of sexual health practitioners.

American College of Obstetricians and Gynecologists (ACOG) is a nonprofit organization of professionals who provide health care for women, including teens. The ACOG Resource Center publishes manuals and patient education materials. The Web site has information on many women's health topics, including reproductive health, breast-feeding, violence, and quitting smoking.

The mission of the American Urological Association Foundation is to prevent, find cures for, and educate the general public and health professionals about urologic diseases and disorders. The foundation has toll-free information lines to answer questions about urologic diseases and disorders. Its Web site is now paired with UrologyHealth.org, which offers patient information about urology.

The National Institute on Aging (NIA), one of the centers of the U.S. National Institutes of Health, leads a broad scientific effort to understand the nature of aging and to extend the healthy, active years of life. The NIA funds research and provides information about health and research advances to the public and interested groups.