Spermatozoa lacking acrosomes were injected into the cytoplasm of mature human oocytes. In two su... more Spermatozoa lacking acrosomes were injected into the cytoplasm of mature human oocytes. In two subsequent cycles, 12 of 28 (43%) oocytes were fertilized, and the ET of the second cycle resulted in a twin pregnancy. This report describes, to the best of our knowledge, the first case of successful fertilization and delivery after using acrosomeless spermatozoa. Our hope is that with increasing experience with microinjection, in the near future, this type of infertility will not remain a serious problem.
Page 1. Disponible en: http://www.redalyc.org/src/inicio/ArtPdfRed.jsp?iCve= 243218229004 Redalyc... more Page 1. Disponible en: http://www.redalyc.org/src/inicio/ArtPdfRed.jsp?iCve= 243218229004 Redalyc Sistema de Información Científica Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Rocha Machado ...
Journal of assisted reproduction and genetics, 2003
To evaluate the relationship between the postvasectomy period and sperm reproductive capacity aft... more To evaluate the relationship between the postvasectomy period and sperm reproductive capacity after ICSI. Seventy-seven ICSI cycles with percutaneous epididymal sperm aspiration (PESA) were reviewed. Patients were divided into 4 groups according to the interval after vasectomy: 0 - 5 years (G1); 6 - 8 years (G2); 9 - 14 years (G3), and > 15 years (G4). Clinical and ongoing pregnancy rates did not correlate significantly with the time period of vasectomy until 14 years. Although the higher implantation rate observed in G1, no significant differences were noted among Groups 1-3. The miscarriage rates increased from G1 to G4, reaching a statistical significance among G1, G2, and G3 compared with G4. When groups were also divided according to the maternal age, the same results were obtained. The interval between the vasectomy and the sperm retrieval procedure has no effect on the outcome until the interval of 14 years.
Spermatozoa lacking acrosomes were injected into the cytoplasm of mature human oocytes. In two su... more Spermatozoa lacking acrosomes were injected into the cytoplasm of mature human oocytes. In two subsequent cycles, 12 of 28 (43%) oocytes were fertilized, and the ET of the second cycle resulted in a twin pregnancy. This report describes, to the best of our knowledge, the first case of successful fertilization and delivery after using acrosomeless spermatozoa. Our hope is that with increasing experience with microinjection, in the near future, this type of infertility will not remain a serious problem.
Page 1. Disponible en: http://www.redalyc.org/src/inicio/ArtPdfRed.jsp?iCve= 243218229004 Redalyc... more Page 1. Disponible en: http://www.redalyc.org/src/inicio/ArtPdfRed.jsp?iCve= 243218229004 Redalyc Sistema de Información Científica Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Rocha Machado ...
Journal of assisted reproduction and genetics, 2003
To evaluate the relationship between the postvasectomy period and sperm reproductive capacity aft... more To evaluate the relationship between the postvasectomy period and sperm reproductive capacity after ICSI. Seventy-seven ICSI cycles with percutaneous epididymal sperm aspiration (PESA) were reviewed. Patients were divided into 4 groups according to the interval after vasectomy: 0 - 5 years (G1); 6 - 8 years (G2); 9 - 14 years (G3), and > 15 years (G4). Clinical and ongoing pregnancy rates did not correlate significantly with the time period of vasectomy until 14 years. Although the higher implantation rate observed in G1, no significant differences were noted among Groups 1-3. The miscarriage rates increased from G1 to G4, reaching a statistical significance among G1, G2, and G3 compared with G4. When groups were also divided according to the maternal age, the same results were obtained. The interval between the vasectomy and the sperm retrieval procedure has no effect on the outcome until the interval of 14 years.
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