Hypertension in pregnancy.

The hypertensive diseases of pregnancy commonly refer to a group of disorders whose definitions have changed over time within and among professional organizations. Pre-eclampsia, either mild or severe, is managed best with a policy of delivery at or beyond 37 and 34 weeks' gestation, respectively. Similarly, chronic hypertension,gestational hypertension, and chronic hypertension with superimposed pre-eclampsia are conditions wherein it is difficult to justify expectant management beyond 37 weeks' gestation. The approach to management before these gestational ages is subject to interpretation of a limited body of literature.