The climax of sexual intercourse. In men this coincides with ejaculation of the semen when the muscles of the pelvis force the seminal fluid from the prostate into the urethra and out through the urethral orifice. In women, orgasm is typified by irregular contractions of the muscular walls of the vagina followed by relaxation. The sensation is more diffuse in women than in men and tends to last longer, with successive orgasms sometimes occurring.