In this method of fertilisation, SEMEN is collected either by the husband (AIH) or by a donor (AID) through masturbation, and introduced into the cervix (neck of the womb) by means of an instrument around the time of OVULATION.

AIH is thought to be particularly useful for men with retrograde ejaculation or erectile IMPOTENCE. AID may be considered when the partner's sperm count is either very low or zero.

Artificial insemination with fresh or frozen semen, whose donors have been screened to exclude sexually transmitted diseases, is usually done at specially staffed centres with facilities to store semen and provide the individuals involved with appropriate counselling. Success rates are up to 70 per cent with fresh semen (used over a six-month period) and over 50 per cent with frozen semen.