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Baha M. Sibai, MD

JAMA. 2007;298:1566-1568.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

In pregnant women, chronic hypertension is defined as elevated blood pressure that is present and documented before pregnancy.¹ In women whose prepregnancy blood pressure is unknown, the diagnosis is based on the presence of sustained hypertension before 20 weeks of gestation. Chronic hypertension is a relatively common disorder occurring in approximately 1% to 5% of pregnant women.¹ Estimating a prevalence of chronic hypertension during pregnancy of 3%, there are at least 120 000 pregnant women with chronic hypertension (3% of 4 million pregnancies) per year in the United States, a rate expected to increase in the United States with the obesity epidemic and as age at childbearing increases.¹

The direct and indirect costs of managing hypertension in pregnancy are extremely high and include the expense of multiple health care visits to the physician's office and emergency department, multiple laboratory tests, antenatal fetal evaluation testing, frequent prenatal hospitalization, . . . [Full Text of this Article]

Author Affiliation: Department of Obstetrics and Gynecology, University of Cincinnati College of Medicine, Cincinnati, Ohio.

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