This retrospective study aimed to analyse the relationship between multi-exposure to noise and air pollution the onset of hypertension disorders during pregnancy It will be conducted in 2650 mothers who gave birth at Dijon or Besançon CHU between 2005 and 2009 split into two groups: * 530 cases (women who experienced hypertension disorders during pregnancy * 2120 controls (women who did not experience a hypertension disorder during pregnancy)
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Onset of a hypertension disorder during pregnancy
Timeframe: at baseline