Saslow, Debbie - eSocialSciences - 2013
The research on breastfeeding and breast cancer risk, it is clear that this has been a difficult area to study. If … breastfeeding does lower risk, the level of protection is small and depends on women breastfeeding for a long time. In countries …. Studies that have found that breastfeeding does lower breast cancer risk have also found that protection builds up over time …