the deliberate use of artificial methods or other techniques to
prevent pregnancy as a consequence of sexual intercourse. The major
forms of artificial contraception are: barrier methods, of which the
commonest is the condom or sheath the contraceptive pill, which
contains synthetic sex hormones which prevent ovulation in the female
intrauterine devices, such as the coil, which prevent the fertilized
ovum from implanting in the uterus and male or female sterilization.