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What is the process of ejaculation?

Madeleine M. Castellanos, MD
Psychiatry
The process of ejaculation begins when a guy is sexually aroused, often -- but not always -- from the direct physical stimulation of his penis during touching, rubbing, oral sex, or intercourse, for example. His brain responds by sending signals to his lower spinal cord. He gets an erection, thanks to his parasympathetic nervous system. As a result, the muscles in his prostate gland, seminal vesicles (both of which produce seminal fluid), and vas deferens (the tube that connects the testicles to the urethra) contract rhythmically, moving semen through those glands and the urethra and, finally, out of his body during ejaculation, a process controlled by the sympathetic nervous system. An orgasm is the sensation of pleasure a man feels during ejaculation.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.