Presence of fetal cells is a double-edged sword for women

[News]

For the first time, scientists have found what could be a causative link between the concentration of circulating Y-chromosome fetal cells in women who gave birth to children of either sex and their risk of later developing breast cancer and colon cancer.

More... (http://www.news-medical.net/news/20120504/Presence-of-fetal-cells-is-a-double-edged-sword-for-women.aspx)