Jul 13, 2012
Researchers have identified seven genetic markers linked with a woman’s breast size, thumb according to a new study.
While it’s was known that breast size is in part heritable, the study is the first to find specific genetic factors that are associated with differences in breast size, the researchers said.
In addition, two of these markers have previously been associated with breast cancer risk. This suggests some of the same biological pathways underlie both normal breast growth and breast cancer, said study researcher Nicholas Eriksson, of 23andMe, the genetic testing company that conducted the study.