Chronic hypertension in pregnancy means a woman has ongoing high blood pressure that starts before pregnancy or early in pregnancy and continues during it.

Simple definition

Chronic hypertension in pregnancy is defined as persistent high blood pressure of at least 140/90 mmHg that is present before conception, is first detected before 20 weeks of gestation, or continues for 12 weeks or more after birth. It is different from gestational hypertension, which appears only after 20 weeks in someone who previously had normal blood pressure and usually resolves after delivery.

Why it matters

This condition increases the risk of complications such as preeclampsia (a dangerous rise in blood pressure with organ damage), preterm birth, and low birthweight. It can also affect the placenta’s function, leading to problems with the baby’s growth and, in severe cases, serious illness for the mother.

How doctors diagnose it

Doctors confirm chronic hypertension by repeatedly measuring blood pressure at or above 140/90 mmHg outside of brief stress situations, paying special attention to when in pregnancy the high readings appear. They also check urine, blood tests, and the baby’s growth to look for signs of superimposed preeclampsia or other complications.

Treatment and care

Many patients are treated with pregnancy‑safe medicines such as labetalol or extended‑release nifedipine, with typical targets around 120–159 systolic and 80–109 diastolic to reduce risks without dropping pressure too low. Care usually includes more frequent prenatal visits, blood and urine tests, and extra ultrasounds to monitor the baby’s growth and wellbeing.

Trends and “latest news”

Chronic hypertension in pregnancy has increased in recent years in the United States, roughly doubling between 2007 and 2021, driven in part by higher rates of obesity and older maternal age. Recent studies also show that many pregnant people with chronic hypertension are still undertreated, which has prompted calls for better screening and tighter blood pressure control during and after pregnancy.

Information gathered from public forums or data available on the internet and portrayed here.