06/04/2026
Preeclampsia isn't a uniform condition with varying degrees of onset....
..there are distinct subtypes that tell very different stories about physiology, what went wrong, and when.
We now recognize at least 3 main subtypes of preeclampsia.
1️⃣ Early Onset Preeclampsia (EOPE)
Associated with impaired placentation - shallow trophoblast invasion, angiogenic imbalances, and significant placental lesions on pathology.
This is the "classic" preeclampsia pattern that tends to show up before 34 weeks and is strongly associated with placental disease that originated in the early pregnancy. This form is frequently associated with fetal growth restriction. This is true placental disease and death.
2️⃣ Late Onset and Postpartum Preeclampsia (LOPE/PPPE)
More often reflects underlying maternal cardiovascular, metabolic, or immune dysregulation that becomes visible during pregnancy's physiological stress. The placenta may appear relatively normal or small on pathology; the baby is often normal in size, and the lab picture may more closely resemble chronic vascular disease than primary placental failure. This form is more associated with maternal physiology that causes placental dysfunction, but outright placental disease. Pregnancy is a maternal stress-test, and this is mom's body struggling to handle the stress of pregnancy...don't worry, we'll cover the whys behind this.
3️⃣ PE-Mimickers
Thyroid disease, lupus flares, chronic kidney disease, kidney stones, NAFLD, infections, certain forms of anemia, and nutritional deficiencies. These can all produce PE-like symptoms without true placental pathology. These patterns demand a different workup and different treatment choice than classic preeclampsia patterns.
