Breast cancer is the most common malignancy in women. With every menstrual cycle, cells in the breast grow and divide and therefore have the possibility of accumulating mutations which could lead to breast cancer. Therefore, the longer a mother breastfeeds, the less likelihood of breast cancer. In The International Journal of Epidemiology it says that breastfeeding can reduce the risk of breast cancer by up to 30 percent.
David Bjerklie writes in Time Magazine, "An analysis of nearly 50 studies involving 150,000 women in 30 countries found that the number of children women bear and how long they breast-feed may help determine their chance of developing breast cancer. Women who had six or seven children and breast-fed each for two years had cancer rates less than half those of women who had two or three children and breast-fed them for only two months.
And what about your figure? Breastfeeding helps you to get back into shape sooner, bringing you back to size by six weeks postpartum. And you use up to 500 calories a day while nursing! Isn't that good? I loved all the years I was nursing babies. I didn't have to worry about what I ate and I still stayed slim!
Later - Human Chorionic Gonadotropin and Estriol