ISOLATED TERATOZOOSPERMIA AND IN-VITRO FERTILIZATION

Purpose: To show whether increased amounts of spermatozoa used in inse mination of preovulatory oocytes in isolated teratozoospermia accordin g to Kruger's strict criteria gives good fertilization rates, Methods: This study was carried out from September 1993 to November 1994 for a total of 77 cycles, with sperm samples classified according to Kruger 's strict classification. Group I (C; control) included 37 couples wit h normal sperm morphology (>14% normal; SC). Group 2 (GP; good prognos is) included 18 couples (morphology, greater than or equal to 4 and le ss than or equal to 14% normal) and group 3 (T; teratozoospermic) incl uded II couples, with isolated teratozoospermia in the male partner (m orphology, <4% normal), Results: No statistically significant differen ce was seen in the three groups regarding age, duration of infertility , aspirated follicles, oocytes collected, and embryos transferred. The re is a statistically significantly difference (P < 0.001) in the numb er of spermatozoa used in insemination in group 3. Conclusions: In con clusion, a morphological classification using strict criteria in the a ssessment of sperm morphology is still very important, as increasing t he sperm number of spermatozoa inseminated per oocyte may improve zona pellucida binding and give better IVF results.