Pregnancy may protect against MS: study

A case-control study of 824 people found a dose response relationship between parity and a first clinical presentation of CNS demyelination. The study, conducted in four different latitudes, found the more children a woman had, the lower her risk.

Lead researcher Professor Anne-Louise Ponsonby from the Murdoch Childrens Research Institute cautioned that the association was not a direct cause-and-effect link. However, the MS rate in women has increased over the past few decades, which suggested it may be due to mothers having later and fewer children, she said. 

Neurology 2012, online 7 March 

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