Fluorescently labeled mAb signal in fetal and maternal tissues via whole body hyperspectral imaging. Experimental set up as described in Fig. S1. Left video shows a naïve control dam that did not receive fluorescent mAb, right video shows dam administered AF488-conjugated UB-621. Playback speed is 10 frames/s. Please note that this is not live imaging so the playback speed is not related to time during a longitudinally assessed process.