What Are the Effects of Coitus Interruptus on the Body?

Coitus interruptus (withdrawal method) refers to the practice of withdrawing the penis from the vagina just before ejaculation, so that semen is ejaculated outside the partner’s body. Although it is commonly used as a contraceptive method, it is unreliable and carries certain health risks.

Compared with other contraceptive methods—such as condom use, oral contraceptives, or intrauterine devices (IUDs)—the withdrawal method has a significantly lower efficacy rate. Although it incurs no financial cost, its low effectiveness exposes users to a substantially higher risk of unintended pregnancy.

If either partner has a sexually transmitted infection (STI) or HIV, coitus interruptus offers no protection against transmission. Pathogens—including viruses and bacteria—can still be transmitted via bodily fluids and mucosal contact.

Abruptly interrupting intercourse at the moment of male orgasm may cause psychological frustration and dissatisfaction for the partner. Sex researchers William Masters and Virginia Johnson suggested that frequent reliance on the withdrawal method may contribute to premature ejaculation or erectile dysfunction.

During sexual intercourse, penile erection results from sexual arousal. Forcibly terminating intercourse at this stage may disrupt the function of the central nervous system and the sacral spinal centers responsible for ejaculation.