Coitus interruptus Health Dictionary

A method of contraception (see contraception, withdrawal method of) in which the male partner withdraws his penis from the vagina before ejaculation occurs. Coitus interruptus is unreliable because sperm can be released before orgasm occurs, and it may cause psychosexual dysfunction in men and women.

a contraceptive method in which the penis is removed from the vagina before ejaculation of semen (orgasm). The method is unreliable (10–20 pregnancies per 100 woman-years) and it may lead to sexual disharmony and anxiety in one or both partners.