A 22-year-old primagravida woman develops hypertension at 32 weeks. She reports no vision change, headache, shortness of breath, or abdominal symptoms. Her pregnancy is uneventful until now. She has no significant past medical history and is not on any medications except vitamins.On examination the blood pressure is 160/100 mm Hg, heart rate is 100/min, and the rest of the examination is normal except for 1+ pedal edema. Her complete blood count, liver enzymes, and electrolytes are normal. The urinalysis is positive for proteinuria. Which of the following is true for this type of hypertension?