Breastfeeding your child for the first six months of their lives has been shown to drop breast cancer risk by up to 40%. Those who breastfeed are 10% less likely to die from breast cancer compared to those who do not. This seems to be because women don't menstruate while breastfeeding, which lowers their exposure to estrogen (an excess of which appears to increase risk). Furthermore, having a child after the age of thirty can raise your risk of breast cancer significantly.
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