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