Pregnancy and Inflammatory Bowel Disease

Inflammatory Bowel disease, including Crohn's disease and Ulcerative Colitis, are chronic diseases. Diagnosis is most often done in women of childbearing age. IBD can have and increase the risk of intrauterine growth retardation, preterm birth… Conversely, pregnancy can have an impact on IBD activity during pregnancy. Moreover, IBD course can be influence in post-partum. The investigators will explore IBD course on 945 patients from the EPIMAD register. The investigators will cross the data on the IBD with data on pregnancy, postpartum but also breastfeeding. The principal aim of this study is to assess the number of flares during pregnancy.