How big is a sperm cell



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Some want to kill sperm cells. The cells also have an active metabolism as substances are absorbed and released. Assisted reproduction and birth control". Journal of Cell Science. Sperm counts vary from about 20 million to million sperm cells per milliliter of ejaculate. The female reproductive tract does not finish in a dead end.
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Sperm cells that give rise to female XX offspring after fertilization differ in that they carry an X-chromosome, while sperm cells that give rise to male XY offspring carry a Y-chromosome. A perspective in the light of published work". But when the researchers examined male competition in D.
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