Abstract
Objective: To compare the fertilization rate and formation of good-quality embryos with conventional IVF and ICSI in patients with non–male factor infertility. Design: Prospective controlled study. Setting: Infertility clinic. Patient(s): Thirty-five patients with non–male factor infertility. Intervention(s): Retrieved sibling oocytes were randomly assigned to conventional IVF or ICSI. Of sibling oocytes assigned to ICSI, only metaphase II oocytes were injected with sperm. Main Outcome Measure(s): Fertilization rate and formation of good-quality embryos per retrieved oocyte. Result(s): Per retrieved oocyte, ICSI resulted in better fertilization rate compared with conventional IVF (71.3% [134 of 188] vs. 57.2% [107 of 187]). Per retrieved oocyte, ICSI also resulted in better formation of good-quality embryos at 48 hours after retrieval compared with conventional IVF (64.4% [121 of 188] vs. 47.1% [88 of 187]). Conclusion(s): In IVF patients with non–male factor infertility, subjecting some sibling oocytes to ICSI increased the fertilization rate and formation of good-quality embryos per retrieved oocyte. It also avoided the problem of total fertilization failure in almost all cases.
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