Release of sperm

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For chimpanzees, on the other hand, sperm competition is a serious issue. In gorillas, for example, they are very small relative to body weight. It is also about how close you get your sperm to it. Fertilizing an egg is not just about how much sperm you can produce. In gorilla society, one male defends a harem of females to ensure only his sperm gets anywhere near their eggs. In fact, the average male will produce roughly billion sperm cells over a lifetime and shed at least one billion of them per month. By puberty, a majority of those follicles close up and only about will ever release mature eggs for fertilization.

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