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Comparison of implantation and miscarriage rate following transfer of slowly frozen vs vitrified blastocysts after FISH-PGS. Group A and B comprises those blastocysts were cryopreserved with the slow freezing method, Group B included blastocyst which were biopsied on day 3; Group C and D comprises blastocysts cryopreserved with vitrification, Group D included blastocysts vitrified after FISH-PGS on day 3
