These tests help doctors diagnose STD infections and better understand the causes of sexual dysfunction in both men and women.

To protect yourself and your partner from STD infection, use a condom during ...

Even a single act of sexual intercourse can lead to pregnancy or an STD infection.

There are still risks of getting STD infections, bad-treatment, street violence and death.

If the STD infection causes irritation of the skin, breaks or sores may make it easier for HIV to enter the body during sexual contact.

Other barrier methods provide limited protection against STD infections in the upper genital tract, but do not protect other areas.

Tests for sexually transmitted diseases (STDs) There are some 19 million new STD infections each year, almost half of them among 15- to 24-year-olds.