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Results are presented of gamete intra-Fallopian transfer with cryopreserved donor semen in cases of male infertility with azoospermia or extreme oligozoospermia. The female partners had no detectable infertility problems and they had first received 10 cycles of intracervical AID without success. Forty-one GIFT cycles performed on 22 such patients gave an overall pregnancy rate of 26.8% (11/41). In 64% (9/14) of these cases, pregnancy occurred after the first GIFT attempt. From these results it is suggested that GIFT with donor semen may be a reasonable alternative after AID failure. The probable reasons for success of GIFT are discussed.