Classification

Pre-existing HTN (pre-pregnancy or <20 wks gest)
Gestational HTN (develops @ ≥20 wks gest)
- w/ or w/o comorbid conditions (ex DM, renal dz)
Preeclampsia: gestational HTN + new proteinuria or ≥1 adverse condition or serious complication
- In “pre-existing HTN” population: resistant HTN, new or worsening proteinuria, ≥1 adverse condition or serious complication
Severe preeclampsia: preeclampsia complicated by ≥1 serious complication
- Warrants delivery regardless of gestational age
“Other hypertensive effects” (ex transient HTN, white-coat, masked HTN)

Reference: Magee LA, Smith GN, Bloch C, et al. Guideline No. 426: Hypertensive Disorders of Pregnancy: Diagnosis, Prediction, Prevention, and Management. J Obstet Gynaecol Can. 2022;44(5):547-571.e1. doi:10.1016/j.jogc.2022.03.002