Table 1.

Classification of hypertensive disorders of pregnancy

Chronic hypertension	SBP ≥ 140 mm Hg and/or DBP ≥90 mm Hg before pregnancy or 20 wk of gestation
	OR
	Use of antihypertensive medication before pregnancy
	Or
	Persistence of hypertension >12 wk after delivery
Chronic hypertension with superimposed preeclampsia	SBP ≥140 mm Hg and/or DBP ≥90 mm Hg before pregnancy or 20 wk of gestation
	Or
	Use of antihypertensives before pregnancy
	Or
	Persistence of hypertension >12 wk after delivery
	And
	Target organ involvement (develops proteinuria or thrombocytopenia, increased transaminase levels, renal insufficiency, pulmonary edema, or new-onset headache)
Gestational hypertension	SBP ≥140 mm Hg and/or DBP ≥90 mm Hg after 20 wk of gestation in a woman who was at baseline normotensive
Preeclampsia	SBP ≥140 mm Hg and/or DBP ≥90 mm Hg after 20 wk of gestation in a woman who was at baseline normotensive and develops proteinuria or thrombocytopenia, increased transaminase levels, renal insufficiency, pulmonary edema, or new-onset headache (target organ involvement)

Abbreviations: DBP, diastolic blood pressure; SBP, systolic blood pressure.