Perfecta3D Hanging Drop Plates allow researchers to form uniform 3D spheroids or embryoid bodies. In a 96- or 384- well format, users simply pipet their cell suspension into each well, and it hangs in a drop below the well. As cells are in suspension, not in contact with any matrices or surfaces, they self-assemble into a spheroid. One spheroid per well gives researchers control over their data points and the size of each spheroid.