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Semen for cryopreservation was collected in a man with a testicular teratoma after unilateral orchidectomy but before chemotherapy which rendered him azoospermic. After two years artificial insemination using this semen in his wife failed repeatedly. The semen quality on thawing was extremely poor in terms of sperm motility. A pre-freeze motility of 90 per cent was reduced to 2 per cent, and the movement was graded as sluggish. Using the techniques of semen and oocyte preparation and in vitro fertilization, a number of cleaving embryos was produced. A pregnancy was established after four of these embryos were replaced in the wife. The pregnancy aborted spontaneously, but a subsequent course of treatment resulted in an on-going twin pregnancy. The potential of in vitro fertilization for overcoming the poor quality of semen after storage by cryopreservation from men with testicular neoplasms is discussed.
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