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Pregnancy and rates of Crohn’s . . . and other stories

BMJ 2020; 368 doi: https://doi.org/10.1136/bmj.m472 (Published 13 February 2020) Cite this as: BMJ 2020;368:m472

Childbearing and Crohn’s disease

An analysis of data from a Norwegian patient register finds that pregnancy leads to a reduction in the risk of Crohn’s disease. Among women whose youngest child was 0-4 years old, rates of diagnosis of Crohn’s disease were roughly a third lower than those in women of a similar age without children (Am J Epidemiol doi:10.1093/aje/kwz285). There was no reduction in the occurrence of Crohn’s disease among fathers. The question is whether this is a biological effect of the pregnancy, something to do with the use or non-use of oral contraception, or simply a …

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