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In the period 2017-2019, the prevalence of any kind of hypertensive disorder among pregnant U.S. women was higher among older women, reaching a rate of 31 percent in those aged 45 to 55 years. The majority of them suffered from pregnancy-associated hypertension, with a rate of 23 percent. This graph shows the prevalence of hypertensive disorders in pregnancy among U.S. women aged 12 to 55 years, by maternal age.