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The blood pressure course in primiparous pregnancy. A prospective study of 383 women
Left lateral recumbent blood pressures were studied throughout pregnancy in all nulliparous women presenting for prenatal care at a single outpatient clinic. Six percent of these women developed preeclampsia. The incidence of preeclampsia was markedly higher among teens (13.6%). Diastolic blood pressure among normal women declined by less than 5 mm Hg from the first trimester to midgestation. During the third trimester the diastolic pressure returned to first-trimester levels. No significant difference was detected in the first- and early-second-trimester group mean blood pressure between normals and women later developing preeclampsia. However, by 25-28 weeks, before the onset of overt preeclampsia, blood pressures were significantly higher among preeclamptics.
Left lateral recumbent blood pressures were studied throughout pregnancy in all nulliparous women presenting for prenatal care at a single outpatient clinic. Six percent of these women developed preeclampsia. The incidence of preeclampsia was markedly higher among teens (13.6%). Diastolic blood pressure among normal women declined by less than 5 mm Hg from the first trimester to midgestation. During the third trimester the diastolic pressure returned to first-trimester levels. No significant difference was detected in the first- and early-second-trimester group mean blood pressure between normals and women later developing preeclampsia. However, by 25-28 weeks, before the onset of overt preeclampsia, blood pressures were significantly higher among preeclamptics.