The incidence of hypotension in both the literature and in clinical practice ranges from 30% to 50% of all patients. Recent literature using a continuous, non-invasive blood pressure monitor suggests that hypotension occurs with greater frequency and may be associated with a higher incidence of adverse effects to either mother or fetus. The incidence and degree of hypotension have been associated with fetal acidosis, which is a sign of either poor perfusion of the placental bed, or increased metabolism due to the blood pressure medications.