Perineal swelling, intermenstrual cycle, and female sexual behavior in bonobos (Pan paniscus)

@article{Paoli2006PerinealSI,
  title={Perineal swelling, intermenstrual cycle, and female sexual behavior in bonobos (Pan paniscus)},
  author={Tommaso Paoli and Elisabetta Palagi and G. Tacconi and Silvana M. Borgognini Tarli},
  journal={American Journal of Primatology},
  year={2006},
  volume={68}
}
Many reports have claimed that the duration of the swelling cycle in female bonobos (Pan paniscus) is longer than that of chimpanzees, and that the bonobo maximum swelling phase is markedly prolonged. Field data on intermenstrual intervals (IMIs) in female bonobos are limited and restricted to interswelling intervals (ISIs), which are assumed to reflect the IMI, though a direct comparison between the duration of ISIs and IMIs is still lacking. Reports on bonobo sexual activity as a function of… 
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TLDR
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