Birth, obstetrics and human evolution

@article{Rosenberg2002BirthOA,
  title={Birth, obstetrics and human evolution},
  author={Karen R. Rosenberg and Wenda R. Trevathan},
  journal={BJOG: An International Journal of Obstetrics \& Gynaecology},
  year={2002},
  volume={109}
}
There are several characteristics that set our species apart from other mammals. We are the only living or extant mammal that habitually walks on two legs. For our body size, we have the largest and the most complex brains of all animals. Humans depend on material culture or ‘tools’ for their survival. Humans universally communicate with each other through abstract symbols known as language. Finally, human females routinely seek assistance when they give birth. In fact, many have argued that… 
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