Human Reproduction, Vol. 8, No. 9, pp. 1438-1442, 1993
© 1993 European Society of Human Reproduction and Embryology
research-article |
Andrology: Percoll semen preparation enhances human oocyte fertilization in male-factor infertility as shown by a randomized cross-over study
Department of Obstetrics and Gynaecology King Faisal Specialist Hospital and Research Centre P.O. Box 3354, Riyadh 11211, Saudi Arabia 2Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre P.O. Box 3354, Riyadh 11211, Saudi Arabia 3Department of Obstetrics and Gynaecology, Nijmegen University P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
Correspondence: 1To whom correspondence should be addressed
The aim of this study was to compare two methods of semen preparation: multiple tube swim-up and Percoll separation, using a randomized cross-over clinical study, in which sperm parameters, oocyte fertilization rates, embryo quality and cell stage were analysed. Overall, there was no difference between the two preparation methods in the normozoospermic cycles. In the male-factor cycles, Percoll extracted a higher total number of spermatozoa (P = 0.02), increased the concentration of motile spermatozoa (P = 0.02), increased the total number of motile spermatozoa per sample (P = 0.02), and enhanced the recovery rate of motile spermatozoa (P = 0.04) compared to swim-up. There was a significant improvement in fertilization rates (P = 0.0006), in the percentage of embryos over 2-cell stage on day of transfer (P = 0.004), and in the number of replaced embryos per transfer (P = 0.01) in the Percoll as compared to swim-up cycles. There was no significant difference in embryo quality. We conclude, therefore, that in advanced reproductive procedures where sperm dysfunction exists, semen preparation with Percoll should replace the swim-up technique.
Key words: in-vitro fertilization/Percoll gradient centrifugation/semen preparation/swim-up