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Implantation rates, pregnancy rates and multiple pregnancy rates of DET for selection criteria I and II. As described in the text, criteria I consists of cases classifying embryos scoring greater than 3AA as high-grade, whereas criteria II includes embryos greater than 3BB as high-grade embryos. Groups A, B and C had either two, one and no high-grade embryos, respectively. Statistically significant differences at * p < 0.05
