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By analysing the head and tail movements of the sperm, researchers have now shown that the sperm moves the fluid in a coordinated rhythmic way, which can be captured to form a relatively simple mathematical formula. This would help us understand why some sperm succeed and others fail. Researchers at the Universities of York, Birmingham, Oxford and Kyoto University, Japan, found that the sperm 's tail creates a characteristic rhythm that pushes the sperm forward, but also pulls the head backwards and sideways in a coordinated fashion. Around 55 million spermatozoa are found in a given sample, so it is understandably very difficult to model how they move simultaneously. Please sign in to add a comment.

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Researchers describe how sperm can lose their way.

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Please sign in to add a comment. Coarse-graining the fluid flow around a human sperm. As Earth orbits the sun at supersonic speed, it cuts a path through the solar wind. Sperm tails are actually complex propellant and navigational devices that help push them through fluids and navigate around complex terrain of the female oviduct. The team aim to use these new findings to understand how larger groups of sperm behave and interact, a task that would be impossible using modern observational techniques.

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