Semen Displacement as a Sperm Competition Strategy in Humans

  • Gallup G
  • Burch R
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Abstract

We examine some of the implications of the possibility that the human penis may have evolved to compete with sperm from other males by displacing rival semen from the cervical end of the vagina prior to ejaculation. The semen displacement hypothesis integrates considerable information about genital morphology and human reproductive behavior, and can be used to generate a number of interesting predictions.

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Gallup, G. G., & Burch, R. L. (2004). Semen Displacement as a Sperm Competition Strategy in Humans. Evolutionary Psychology, 2(1), 147470490400200. https://doi.org/10.1177/147470490400200105

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