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mLine 3:
Line 3: − + + − * There is some controversy as to whether abortion increases the risk of breast cancer. <ref>http://www.cancercouncil.com.au/editorial.asp?pageid=245</ref>
Reverted edits by Horace (Talk); changed back to last version by Aschlafly
==Risk factors==
==Risk factors==
Many factors may affect the incidence of breast cancer in any given population of women including:
Many factors affect the incidence of breast cancer in any given population of women including:
* diet <ref> http://unisci.com/stories/20021/0104023.htm </ref>
* diet <ref> http://unisci.com/stories/20021/0104023.htm </ref>
* racial grouping <ref> http://www.womenshealthnetwork.org/advocacy/wocbreastca/natam.htm </ref>
* racial grouping <ref> http://www.womenshealthnetwork.org/advocacy/wocbreastca/natam.htm </ref>
* obesity <ref> http://society.guardian.co.uk/cancer/story/0,,686105,00.html </ref>
* obesity <ref> http://society.guardian.co.uk/cancer/story/0,,686105,00.html </ref>
* [[abortion]]
* family history if such a history involves having several generations affected by breast cancer or having many relatives diagnosed with breast cancer at less than 50 years old <ref> http://www.breastcancer.org/cmn_who_indrisk.html </ref>
* family history if such a history involves having several generations affected by breast cancer or having many relatives diagnosed with breast cancer at less than 50 years old <ref> http://www.breastcancer.org/cmn_who_indrisk.html </ref>
* prolonged uninterrupted exposure to estrogen (e.g. by having an early [[menarche]] and late [[menopause]] or by having no full-term pregnancies).<ref> http://www.breastcancer.org/cmn_who_indrisk.html </ref>
* prolonged uninterrupted exposure to estrogen (e.g. by having an early [[menarche]] and late [[menopause]] or by having no full-term pregnancies).<ref> http://www.breastcancer.org/cmn_who_indrisk.html </ref>
* age: increasing age increases the risk that at some point in her life a woman will contract breast cancer, rising from 1 in 231 (0.5% risk) aged under 40 to 1 in 7 at age 90. <ref> http://www.breastcancer.org/cmn_who_indrisk.html </ref>
* age: increasing age increases the risk that at some point in her life a woman will contract breast cancer, rising from 1 in 231 (0.5% risk) aged under 40 to 1 in 7 at age 90. <ref> http://www.breastcancer.org/cmn_who_indrisk.html </ref>
==Ways of reducing the risk==
==Ways of reducing the risk==