Human Reproduction, Vol. 11, No. 10, pp. 2180-2185, 1996
© 1996 European Society of Human Reproduction and Embryology
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Andrology: Fertilizing ability of immotile spermatozoa after intracytoplasmic sperm injection
Schoysman Infertility Management Foundation, Van Helmont Hospital Vaartstraat 42, 1800 Vilvoorde, Belgium
Correspondence: 1To whom correspondence should be addressed
Sometimes spermatozoa from ejaculate, epididymis or testis show a total absence of motility. For some patients, however, very few spermatozoa with very poor motility can be found after several hours of incubation (initially immotile spermatozoa). Other samples show no motility at all even after extended culture (totally immotile spermatozoa). Intracytoplasmic sperm injection (ICSI) is the only method available to select and retrieve a single immotile or initially immotile spermatozoon and inject it into the oocyte. A total of 103 patients with asthenozoospermia underwent ICSI in this study. It was shown that initially immotile and totally immotile spermatozoa, whatever their origin, have the capacity to fertilize an oocyte after ICSI. No significant difference could be observed between the fertilizing capacity of testicular or epididymal spermatozoa. Totally immotile ejaculated spermatozoa, however, fertilized significantly fewer oocytes after ICSI when compared with initially immotile ejaculated spermatozoa. Embryos of lower quality tended to be produced when totally immotile spermatozoa of any origin were used, compared with embryos resulting from initially immotile spermatozoa. Ongoing pregnancies were conceived after ICSI with initially immotile spermatozoa from any origin and totally immotile spermatozoa retrieved from testis only. One biochemical pregnancy was the result of embryo transfer after ICSI with totally immotile ejaculated spermatozoa. No supernumerary embryos could be cryo-preserved for patients with totally immotile spermatozoa from ejaculate or epididymis. For a Kartagener patient, subzonal insemination (SUZI) seemed to be a better approach for obtaining fertilization and pregnancy than ICSI because no fertilization occurred after ICSI on sibling oocytes. Hence a healthy pregnancy was obtained after SUZI.
Key words: ICSI/immotile spermatozoa/Kartagener syndrome
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