Time-lapse movie of a tripronuclear (3PN) zygote derived from conventional in vitro fertilization (c-IVF) that expresses the chromosome marker TagGFP2-H2B (green) and microtubule marker FusionRed-MAP4 (red). This video is available from the online version of the article at https://doi.org/10.1530/REP-21-0061.