RESUMO
<p><b>OBJECTIVE</b>To evaluate the influence of big Y chromosome on the outcomes of in vitro fertilization and embryo transfer.</p><p><b>METHODS</b>Data of 127 cycles of IVF/ICSI-ET, performed in our Reproductive Medicine Center from March 2001 to June 2003 were analyzed. The patients were divided into two groups according to the length of chromosome: Group A, 56 cycles with big Y chromosome</p><p><b>RESULTS</b>No significant difference was observed in the quality of embryos and in the and Group B, 71 cycles with normal karyotype. rates of fertilization, cleavage, clinical pregnancy, implantation, miscarriage, ectopic pregnancy, dead infant delivery, malformation,</p><p><b>CONCLUSION</b>Big Y chromosome has no significant influence on the baby boy delivery and baby girl delivery between the two groups. development of embryos and the outcome of pregnancy.</p>