| http://www.w3.org/ns/prov#value | - Researchers aren???t sure why this is so but they suspect that changing hormones in the female menstrual cycle may have something to do with it.AgeIBS can affect people of any ages but the symptoms are more likely to appear for the first time in people aged 20-30.Family historyStudies have shown that people who have a first-degree relative, such as a parent or sibling, with IBS are at increased ri
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