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Comparison of early embryogenesis of mice, rabbits and humans from zygote to epiblast stage and during PGC differentiation. pX paternal X chromosome, mX maternal X chromosome, ipX inactivated paternal X chromosome, ICM inner cell mass, TE trophectoderm, PGC primordial germ cell, TNAP tissue‐nonspecific alkaline phosphatase (AP)
