Which set of embryo variables is most predictive for live birth? A prospective study in 6252 single embryo transfers to construct an embryo score for the ranking and selection of embryos

Abstract excerpt

STUDY QUESTION: Which embryo score variables are most powerful for predicting live birth after single embryo transfer (SET) at the early cleavage stage? SUMMARY ANSWER: This large prospective study of visual embryo scoring variables shows that blastomere number (BL), the proportion of mononucleated blastomeres (NU) and the degree of fragmentation (FR) have independent prognostic power to predict live birth. WHAT...

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