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Sperm Competition and the Evolution of Human Sexuality

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The Evolution of Sexuality

Part of the book series: Evolutionary Psychology ((EVOLPSYCH))

Abstract

Sperm competition occurs when a female copulates with two or more males within a sufficiently brief time period, resulting in sperm of the different males competing to fertilize ova. Sperm competition has been documented or inferred to occur across several species. We review the evidence for sperm competition in humans. Specifically, we review literature indicating apparently convergent adaptations to sperm competition in humans and nonhumans. We discuss future research directions and conclude that the research that documents anatomical, biological, physiological, and behavioral adaptations to human sperm competition provides compelling evidence that sperm competition has been a recurrent feature of human evolutionary history.

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Acknowledgments

We would like to thank Jennifer Vonk for her helpful comments and suggestions. This chapter is based on Pham and Shackelford (in press).

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  1. Department of Psychology, Oakland University, 48309, Rochester, MI, USA

    Michael N. Pham & Todd K. Shackelford

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  1. Michael N. Pham
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  2. Todd K. Shackelford
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Correspondence to Michael N. Pham .

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  1. Department of Psychology, Oakland University, Rochester, Michigan, USA

    Todd K. Shackelford

  2. Department of Psychology, Oakland University, Rochester, Michigan, USA

    Ranald D. Hansen

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Pham, M., Shackelford, T. (2015). Sperm Competition and the Evolution of Human Sexuality. In: Shackelford, T., Hansen, R. (eds) The Evolution of Sexuality. Evolutionary Psychology. Springer, Cham. https://doi.org/10.1007/978-3-319-09384-0_12

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