Maternal deaths caused by preeclampsia are rare in the U.S. Fetal or perinatal deaths are high and generally decrease as the fetus matures. Preeclampsia does not appear to lead to chronic high blood pressure . Fetal complications may occur because of prematurity at time of delivery. Call your health care provider if symptoms occur during pregnancy . A sphygmomanometer is used to measure blood pressure, and is the most accurate method.
Blood pressure is measured against the height of a column of mercury.
This is the most accurate method because it can only be made inaccurate by changing the gravitational constant of the earth.