A quantitative model of normal Caenorhabditis elegans embryogenesis and its disruption after stress

► We develop improved automated lineage tracing tools for Caenorhabditis elegans embryos. ► We generate a model of embryogenesis and provide a 3D software viewer. ► Variability of cell cycle length, division orientation and position is low. ► Specific classes of cells have increased variability. ► Embryonic variability increases nonlinearly with temperature.