Definition
Human Sperm Competition
The competition to fertilize a woman’s egg between sperm from two or more different men.
Introduction
Sperm competition was first studied in insects (Parker 1970), but was soon suspected to occur in other animals, including humans (Smith 1984). A series of publications (see Robin Baker and Mark Bellis: Pioneers of Research on Human Sperm Competition) claimed to have found evidence that confirmed this suspicion. These claims triggered a wave of opposition (see Opposition to human sperm competition).
Currently, authors are divided into three main groups. The first (e.g., Baker and Bellis 1995; Gallup et al. 2006) considers that sperm competition occurred sufficiently often in the human past to have been a major selective pressure on sexuality. The second (e.g., Dixson 2009; Larmuseau et al. 2016) proposes that human sperm competition happened rarely and has played either a minor or zero role in human evolution. The third (Marczyk and Shackelford 2010)...
References
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Baker, R. (2016). Human Sperm Competition. In: Shackelford, T., Weekes-Shackelford, V. (eds) Encyclopedia of Evolutionary Psychological Science. Springer, Cham. https://doi.org/10.1007/978-3-319-16999-6_1957-1
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DOI: https://doi.org/10.1007/978-3-319-16999-6_1957-1
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