Research shows how pregnancy lowers risk of breast cancer

[News]

Being pregnant while young is known to protect a women against breast cancer. But why? Research in BioMed Central's open access journal Breast Cancer Research finds that Wnt/Notch signalling ratio is decreased in the breast tissue of mice which have given birth, compared to virgin mice of the same age.

More... (http://www.news-medical.net/news/20130429/Research-shows-how-pregnancy-lowers-risk-of-breast-cancer.aspx)