Some studies suggest that high blood pressure that develops during pregnancy — before 20 weeks (chronic hypertension), after 20 weeks (gestational hypertension) or after 20 weeks and accompanied by protein in the urine (preeclampsia) — might be more common in older women. Your health care provider will carefully monitor your blood pressure and your baby's growth and development. You might need to take medication or deliver your baby before your due date to avoid complications.