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In assisted reproduction, a successful outcome is closely associated with the selection of potentially implantable. Blastocyst culture has its ownmerits that it can possibly eliminate the selection of non-viable embryos, canmimic physiology with better embryo-uterine synchrony and the extended culture can also assess the embryos post-embryonic genomic activation. Scoring of blastocyst characteristics can also aid in single embryo transfers (SET), reducing the risks of multiple pregnancies. The morphological assessment can serve as a non-invasive tool for better prediction of the outcome in IVF. The two importantmorphological parameters of blastocyst grading the inner cell mass (ICM) and the trophectoderm(TE) other than the expansion of the blastocoel cavity. Various groups reported the importance of either characteristic predicting implantation, pregnancy and live birth. In this retrospective study, we have evaluated which one of these parameters possess the predictive ability of implantation and pregnancy. The embryos frozen as blastocysts following morphological scoring in the stimulated cycles were replaced in subsequent cycles. The transferred blastocysts with known implantation were grouped into four different combinations of grades of ICM and TE and analyzed for the association with the clinical pregnancy and the indings were statistically validated. This study demonstrates there is a signi icant correlation between the grades of TE cells and the clinical pregnancy, so TE grade possibly is a better predictor of in blastocyst transfers. The trophoectoderm grades of embryo can be used as a selection tool for a better IVF outcome.

Trophectoderm morphology is a better predictor of clinical pregnancy in blastocyst transfers