Introduction : Cesarean rate varies from 45% to 73% in the literature in patient with diabetes type 1. Having a prior C-section is the most important risk factor. The aim of this study was to identify risk factor of cesarean in this population.

Methods: This study is an observational, retrospective and single-center study from the hospital of Montpellier. All the pregnancies, planned or not, with subcutaneous insulin infusion or multiple daily injections of insulin, in patients with diabetes type 1 between 2009 and 2015, after 24 weeks of gestation were included. All the data were retrospectively collected by the principal investigator with computer and paper files.

Inclusion Criteria:

• Pregnant women with diabetes type 1
• Pregnancy initiated between 2009 and 2015
• Pregnancy followed up in the universitary hospital center of Montpellier

Exclusion Criteria:

• Women who deliver in an other center
• women with intraperitoneal injections of insulin
• twin gestation
• termination of pregnancy

All pregnant women with diabetes type 1