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Three types of sperm

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    Sperm heteromorphism is the simultaneous production of two or more distinguishable types of sperm by a single male. Sperm heteromorphism is also called sperm polymorphism or sperm dimorphism for species with two sperm types. Typically, only one sperm type is capable of fertilizing eggs. Fertile types have been called "eusperm" or "eupyrene sperm" and infertile types "parasperm" or "apyrene sperm". One interpretation of sperm polymorphism is the "kamikaze sperm" hypothesis Baker and Bellis, , which has been widely discredited in humans. The kamikaze sperm hypothesis states that the polymorphism of sperm is due to a subdivision of sperm into different functional groups.
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    Sperm competition

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    Sperm heteromorphism - Wikipedia

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    The different types of sperm morphology and behavior within a single species

    Pondering sperm and semen and wondering how they differ? Semen and sperm are kinda like squares and rectangles. Semen, also called ejaculate or cum, is the whitish fluid that comes out of the penis when a person comes — well, usually, but not always. I mean, both come out the same place, after all.
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    Try out PMC Labs and tell us what you think. Learn More. Some coastal squids exhibit male dimorphism large and small body size that is linked to mating behaviors. Here, we report that sperm clusters are able to move en masse.
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