Definition
Many species have faced sperm competition (when sperm from two or more males compete to fertilize an egg in a female’s reproductive tract) in their ancestral past to varying degrees. In the history of human evolution, the common mating system of social monogamy led to decreased levels of sperm competition relative to some other primates; however, it was not completely absent. Evidence of this history of sperm competition is seen in both men and women in terms of their genetic makeup, anatomy, and evolved mating psychology.
Introduction
In humans, there is evidence that they repeatedly faced sperm competition in their ancestral past. That is, women mated with two or more men in a sufficiently brief window of time to allow sperm from more than one man into their reproductive tract that subsequently would compete to fertilize ova (Parker 1970). Because the most common mating system in humans is...
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DeLecce, T. (2016). History of Sperm Competition in Humans. In: Weekes-Shackelford, V., Shackelford, T., Weekes-Shackelford, V. (eds) Encyclopedia of Evolutionary Psychological Science. Springer, Cham. https://doi.org/10.1007/978-3-319-16999-6_1942-1
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DOI: https://doi.org/10.1007/978-3-319-16999-6_1942-1
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