Table 1.

Classification of hypertension in pregnancy.

Chronic hypertension	(i) increased BP before week 20 (or known to exist prior to pregnancy) (ii) hypertension persistent for more than 12 weeks after pregnancy
Preeclampsia-eclampsia	(i) de novo appearance of hypertension after mid-pregnancy (ii) proteinuria at least 300 mg/24 hr
Preeclampsia superimposed upon existing hypertension	(i) new onset proteinuria
Gestational hypertension	(i) transient hypertension appearing after mid-pregnancy (ii) confirmed by return to normal BP postpartum (iii) no proteinuria