What are the diagnostic criteria for gestational hypertension according to the chapter?

Gestational hypertension is diagnosed by a systolic blood pressure of ≥140 mm Hg and/or a diastolic blood pressure of ≥90 mm Hg, measured on two occasions at least 4 hours apart, occurring after 20 weeks of gestation. It is characterized by the absence of proteinuria or other abnormal lab values and resolves by 6 weeks postpartum.

Gestational hypertension is defined by the onset of hypertension after 20 weeks of gestation in a previously normotensive individual. The diagnostic criteria include a systolic blood pressure of 140 mm Hg or higher and/or a diastolic blood pressure of 90 mm Hg or higher, confirmed by two separate measurements taken at least 4 hours apart. Unlike preeclampsia, gestational hypertension does not involve proteinuria or other systemic complications. The condition typically resolves within 6 weeks postpartum, distinguishing it from chronic hypertension, which predates pregnancy or persists beyond this period.