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Live images observed at the inverted microscope. Preimplantation genetic diagnosis. Trophectoderm biopsy. A. Note blastocyst retraction and the hole made by the laser beam. B. Note blastocyst expansion and the beginning of hatching (arrowhead). The biopsied cells (arrow) are inside the biopsy micropipette (mb). C. Full blastocyst expansion. Note biopsied cells (arrow) outside the biopsy micropipette.
