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The first lineage segregation event in mouse embryos produces two separate cell populations: inner cell mass and trophectoderm. This is understood to be brought about by cells sensing their position within the embryo and differentiating accordingly. The cellular and molecular underpinnings of this process remain under investigation and have variously been considered to be completely stochastic or alternately, subject to some predisposition set up at fertilisation or before. Here, we consider these views in light of recent publications, discuss the possible role of cell geometry and mechanical forces in this process and describe how modelling could contribute in addressing this issue.

Original publication




Journal article


Semin Cell Dev Biol

Publication Date





74 - 79


Cell geometry, Cell lineage, Computational modelling, Hippo pathway, Mechanical forces, Preimplantation mouse embryos, Animals, Blastocyst, Cell Differentiation, Cell Lineage, Cell Movement, Gene Expression Regulation, Developmental, Humans, Mice, Models, Biological, Signal Transduction