Semen

The fluid produced by the male which carries the sperm to the female, often resulting in pregnancy.

Sperm are produced in the testicles?, and most of the fluid in the prostate?. At the time of male orgasm, semen is ejected from the penis.

All sexual behaviors that result in the contact of semen with the vagina or vulva may result in pregnancy at any time unless adequate contraceptive (birth control) measures are in force. Sexual intercourse is generally a very effective cause of pregnancy and should be avoided unless pregnancy is desired (see abstinence), unless other adequate contraceptive measures are in force.

Semen can also transmit sexually transmitted diseases, most notably AIDS. Contact with the semen of a person infected with the HIV (AIDS) virus should be avoided.