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. 2020 Jan 21;10:854. doi: 10.1038/s41598-020-57817-x

Figure 1.

Figure 1

Schematic diagrams of live-cell imaging and subsequent embryo transfer. We performed IVF to obtain pronuclei (PN) stage embryos. After injecting mRNA encoding histone H2B-mCherry into the cytosol of 2PN, time-lapse imaging was performed 3-dimensionally. We observed chromosome segregation during the 1st, 2nd, and 3rd mitosis. Single embryo transfer of observed blastocysts was performed on day 4. Six blastocysts with different coat colors were implanted as controls to determine whether the case of no pups was due to embryo quality or pseudopregnant mouse implantation ability/technique of embryo transfer. Sixteen days after embryonic transfer, pups were obtained by cesarean section.