Study: Nursing babies cuts breast-cancer risk Months of feeding, more births outweigh genetics, researchers find 07/19/2002 Associated Press LONDON - The number of children women have and the length of time they breast-feed them are the most important factors influencing their chance of developing breast cancer even more important than genetic factors, new research shows. The study, published this week in The Lancet medical journal, found that if women in the industrialized world breast-fed each of their children six months longer, they could reduce their chance of breast cancer by 5 percent, even if they have a strong family...