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Volume 2, Issue 2 (June 2000) 2, 125–130;

Pregnancies established through intracytoplasmic sperm injection (ICSI) using spermatozoa with dysplasia of fibrous sheath

S. Burgo Olmedo, V.Y. Rawe, F.N. Nodar, G.D. Galaverna, A.A. Acosta, H.E. Chemes

Centro de Estudios en Ginecologa y Reproduccin, CEGyR, Buenos Aires, Argentina
    Laboratory of Testicular Physiology and Pathology, Endocrinology Division, Children's Hospital, Buenos Aires, Argentina

Advance online publication 1 June 2000


Aim: Dysplasia of the fibrous sheath (DFS) is an anomaly found in asthenozoospermic patients with extremely low or absent motility. In order to determine the efficacy of ICSI in these patients, a retrospective analysis of ICSI results in DFS patients has been done. Methods: Ten ICSI attempts were performed in 6 patients with diagnosis of Dysplasia of the Fibrous Sheath studied by transmission and scanning electron microscopy. Results: In the cases studied, sperm concentration was (29.6218.05)106/mL, total motility was 1.141.31%. Progressive motility was 0% except for one case with 0.1%. One hundred and three preovulatory oocytes were obtained and 94 metaphase II oocytes were injected. Sixty-nine of them showed two pronuclei (fertilization rate: 73.4%). Forty-nine embryos were obtained and 34 were transferred (mean: 3.4 embryos per transfer). Five pregnancies were diagnosed by -hCG plasma level determinations that resulted to be one preclinical abortion, one clinical abortion and three deliveries. Another pregnancy (ongoing) was achieved from a cryopreserved embryo transfer. Conclusion: These results showed that ICSI provides a suitable solution for patients suffering from irreversible sperm defects such as DFS. Nevertheless, it is mandatory to inform couples of possible transmission risks to offspring, which are unknown at present. Only when the etiology of this problem is disclosed, it will be possible to assess the real genetic risk.

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