High pregnancy and implantation rates can be obtained with preincubation of oocytes before insemination in IVF and ICSI procedures — Oak Academic Publishing
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High pregnancy and implantation rates can be obtained with preincubation of oocytes before insemination in IVF and ICSI procedures
FERTILAB Laboratory of Assisted Reproduction, Lima, Perú
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Laboratory of Assisted Reproduction, Alcival Hospital, Guayaquil, Ecuador
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Laboratory of Assisted Reproduction, Alcival Hospital, Guayaquil, Ecuador
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Laboratory of Assisted Reproduction, Alcival Hospital, Guayaquil, Ecuador
1 FERTILAB Laboratory of Assisted Reproduction, Lima, Perú
2 Laboratory of Assisted Reproduction, Alcival Hospital, Guayaquil, Ecuador
3 Laboratory of Assisted Reproduction, Alcival Hospital, Guayaquil, Ecuador
4 Laboratory of Assisted Reproduction, Alcival Hospital, Guayaquil, Ecuador
Purpose: Evaluate the effect of preincubation of oocytes prior to IVF or ICSI cycles with embryo transfer at blastocyst stage. Methods: Retrospective non randomized study based on secondary analysis of data. Setting: Laboratory of Assisted Reproduction at the Alcivar Hospital. Patients: One hundred-eighteen cycles of IVF and ICSI were analyzed in the present study. The evaluated groups were formed for those patients whose oocytes, after retrieval, were inseminated at 1-3 h (Group I) or 4-6 h (Group II). Results: There was no difference in fertilization rate (83.6% and 78.1%), Day 3 cleavage rate (95.1% and 97.1%), and blastocyst formation (31.1% and 39.1%) for groups I and II respectively. Clinical pregnancy rates (PR: 53.0% vs 22.9%) and implantation rates (IR: 38.1% vs 13.0%) were significantly higher in group II versus group I, respectively (P < 0.05). Conclusions: Preincubation of oocytes before insemination is a factor which raises the PR and IR after the blastocyst transfer.
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