Researchers Find why Having Children Protects Women from Breast Cancer

There are several risk factors that make some women more vulnerable to breast cancer and one of them is not having any children or having first child after age 35. But, how pregnancy affects a woman's chances of breast cancer wasn't known. Now, a team of researchers have found that it depends on the Wnt/Notch signaling ratio which is decreased in mice models that give birth when compared with mice that didn't have any children.