Unmanaged preeclampsia can prevent a developing fetus from getting enough blood and oxygen, damage a mother's liver and kidneys, and, in rare cases, progress to eclampsia, a much more serious condition involving seizures.
In either case, the risks are about the same —
unmanaged chronic hypertension in pregnancy is linked to increased risk of gestational diabetes, placental abruption,
preeclampsia, and intrauterine growth restriction.