Table 1. Mouse embryo development by embryonic day, morphological stage and approximate cell number, based on Mihajlovic and Bruce, 2017 [19].

Embryonic Day	Stage	Cell Number
E0.5	Zygote	1
E1.5	2-cell stage	2
E2.0	4-cell stage	4
E2.5	8-cell stage	8
E3.0	Morula	16
E3.5	Early blastocyst	32
E4.0	Mid blastocyst	64
E4.5	Late blastocyst	>100