| http://www.w3.org/ns/prov#value | - During every menstrual cycle, women are exposed to a peak of estrogen before they ovulate.??? Estrogen is a female hormone, and it is considered a carcinogen.??? Estrogen stimulates the woman???s Type 1 and 2 lobules during every cycle.??? Therefore, the more menstrual cycles she has, especially before the birth of a first child, the greater her risk is.??? The woman who remains childless througho
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