[The mean blood pressure in the second trimester (map-2) as a valuable aid in the early recognition of the pregnancies with a risk of hypertension (author's transl)].

The mean blood pressure in the second trimester of pregnancy was calculated with a formula (Formula: see text) which stands for systolic pressure plus twice diastolic pressure divided by 3 equals mmHg. In 285 patients 43% had a MPA-2 value of 85 mmHg. or higher. At this threshold value 89% of all later hypertensions were recognized. An MAP-2 value of 90 mmHg. was found in 21% of the patients. In this group 63% became hypertensive. However, this group contained 10 of the 11 moderately severe and severe cases. In the outcome of the pregnancies there was a significant increase in prepathological fetal monitoring changes and a significant increase in suspicious Apgar values. The calculation of the MAP-2 value should become a part of routine prenatal care.