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The CaFE reporter reveals a late calcium wave during polyspermy. Time-lapse images of a late calcium wave in the uterus of a worm treated with RNAi against egg-3. Time 0 was defined as the first frame exhibiting a signal in the +2 embryo. The positions of the −1 oocyte and the +1 and +2 embryos are marked in the first frame. Scale bars: 100 µm.
