The Evolution of Seasonal Delayed Implantation

@article{Sandell1990TheEO,
  title={The Evolution of Seasonal Delayed Implantation},
  author={Mikael Sandell},
  journal={The Quarterly Review of Biology},
  year={1990},
  volume={65},
  pages={23 - 42}
}
  • M. Sandell
  • Published 1 March 1990
  • Biology, Medicine
  • The Quarterly Review of Biology
Seasonal delayed implantation has been described in 47 mammalian species in ten families, and has evolved independently at least 17 times. After reviewing earlier explanations for the phenomenon I present a hypothesis to explain the evolution of seasonal delay. I have assumed that females can increase their fitness by chossing their mates. Consequently, mating should take place during that time of year when the possibilities for female choice or male competition are greates. Time of birth is… 
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The potential for reproductive delays to facilitate post‐copulatory sexual selection is investigated, avenues for research that may further the knowledge of sexual selection are suggested and a general review of reproductive delays in mammals is provided.
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