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Schematic illustration of sperm sorting on a microfluidic chip with the crescent shape diffuser zone. (A) Photograph of the microfluidic chip microdevice. (B) Chambers and microchannels of the microdevice. (C) Simulation of the countercurrent flow. (D) The magnitude of the velocity in a diffuser zone. (E) Schematic for sperm sorting on the chip. Reproduced with permission. 68 Copyright 2018, National Academy of Sciences.
