In Issue 13, Henning J. Falk, Takehito Tomita, Alexander Aulehla and colleagues simultaneously image up to four mouse embryos using selective plane illumination microscopy (SPIM-for-4) to examine the oscillatory signalling dynamics from early gastrulation to somitogenesis. In our featured movie, the embryo is expressing the Notch signalling reporter LuVeLu (cyan) and R26H2Bmcherry to mark nuclei (red), and is imaged from the late allantois bud stage onwards.

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