Abstract
SummaryAssisted hatching (AH) was developed as a possible solution to repeated implantation failure. The aim of this analysis was to examine the relationship between the morphology of embryos in a previous cycle on outcome in a subsequent cycle with AH. A total of 175 AH cycles performed after previous failed ART without hatching were divided into group A with optimal and group B with suboptimal embryos transferred previously. The groups were similar in terms of demographic and cycle characteristics. In group A, there was a significant improvement (p < 0.001) in implantation (28.8 vs 5.1%), clinical pregnancy (41.9 vs 12.1%) and live birth rate (38.5 vs 8.6%) compared with group B. The data suggest that the prognosis for treatment is better if AH is performed after failure despite optimal embryos compared with failure associated with suboptimal embryos and embryo quality is the most significant factor affecting outcome.
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