Representative image of immunofluorescent staining of a hatched mouse blastocyst in control. DAPI-nuclear stain; phalloidin- F-actin; Cy3- inner cell mass (ICM); Cdx2- trophectoderm (TE). Image was taken using the Confocal-Zeiss LSM 880 airyscan microscope at the Carl R. Woese Institute for Genomic Biology's Core Facility.