Table 2.

Classification of hypertensive disorders of pregnancy by the 2018 ESC guidelines (67).

Pre-existing hypertension •either preceding pregnancy or developing before 20 weeks' gestation; usually persisting for more than 42 days postpartum

Gestational hypertension •developing after 20 weeks' gestation; usually resolving within 42 days postpartum    1. Without significant proteinuria    2. With significant proteinuria = pre-eclampsia (protein excretion > 0.3 g/day or ACR ≥ 30 mg/mmol)

Pre-exising hypertension + superimposed gestational hypertension with proteinuria •pre-existing hypertension associated with further BP increase and protein excretion > 3 g/day after 20 weeks' gestation

Antenatally unclassifiable hypertension •this term is used when BP is first recorded after 20 weeks of gestation and hypertension is diagnosed; re-assessment is necessary after 42 days post-partum.

ACR, albumin/creatinine ratio.