Correlation between oxygen consumption at the blastocyst stage and number of total (A), ICM (B), and TE (C) cells and the percentage of ICM cells relative to total cell number (A4).

<p>**Coefficient of determination, <i>r</i>, was statistically significant based on simple regression analysis (<i>P</i><0.01). Relationship between oxygen consumption at the blastocyst stage and hatching after 48 additional hours of culture (<b>D</b> and <b>E</b>). The level of oxygen consumption was considered high or low with a cut-off of 0.84×10⁻¹⁴ mol s⁻¹ (<b>E</b>). Double asterisks indicate significant differences between groups based on the χ² test (<i>P</i><0.01).