This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:

The objective of this review is to ascertain if the use of diuretics in pregnancy prevents the onset of pre‐eclampsia. This will include both pre‐eclampsia arising in previously normotensive women (with normal blood pressure) and superimposed pre‐eclampsia arising in a woman with chronic hypertension (pre‐existing high blood pressure).