Sperm Collide Along Liquid Maze on Way to Fertilize Egg

cells navigate the complex fluid-filled channels of the female reproductive tract by crawling along walls and swimming around corners, a new study reveals.
And although millions of sperm cells are ejaculated, the few that actually reach an egg collide frequently along the way.
This new insight on how sperm travel could help scientists develop new treatments for infertile couples, say British researchers who injected the cells into hair-thin microchannels, or mini-mazes, to identify which

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