Fig. 2.

Development Photomicrographs of mouse vitrified 2-cell embryos. a 2 h later: 2-cell stage, Magnification ×200. b 24 h later: 4-cell or 8-cell stage, Magnification ×200. c 48 h later: morula stage and early blastocyst stag, Magnification ×200. d–f 96 h later or hatched blastocyst stage. Magnification ×400