Traditionally, a sexual union between a male and a female in which the penis is inserted into the vagina.
Physical contact between people which involves stimulation of the genitals, especially the insertion of a man’s erect penis into a woman’s vagina with release of spermatozoa from the penis by ejaculation, which may fertilise ova from the woman’s ovaries.
The penetration of a woman’s vagina by a man’s penis. The penis must be erect or semierect to enter the vagina. Once inside, the penis ejaculates or releases a thick fluid called semen. This fluid contains millions of sperm, which may travel from the vagina through the uterus into a fallopian tube and fertilize or unite with an egg. In order to prevent pregnancy, it is important for either partner to use effective means of contraception during sexual intercourse.
Any sexual union between two or more partners in which at least one partner’s genitalia are stimulated.
The reproductive process in which the penis is inserted into the vagina and through which a new human life may begin.
A term sometimes used to describe a variety of sexual activities, but which specifically refers to the insertion of a man’s penis into a woman’s vagina. Sexual intercourse is the usual means of achieving fertilization. It is also a means of achieving orgasm for one or both partners.