⚠ INFORMATIONAL USE ONLY. This tool is for educational purposes and clinical decision support. It does NOT provide medical advice, diagnosis, or treatment recommendations. All therapeutic decisions must be discussed with and made by a qualified healthcare provider.
High blood pressure (hypertension) during pregnancy is one of the most common and serious complications of pregnancy, affecting up to 10% of all pregnancies. It is a leading cause of maternal and infant illness and death worldwide. There are several types, each with different causes, timing, and risks.
Types of Hypertension in Pregnancy
Chronic Hypertension: High blood pressure that was present before pregnancy or that is diagnosed before 20 weeks of pregnancy.
Gestational Hypertension: New high blood pressure that develops after 20 weeks of pregnancy without other signs of preeclampsia. It usually goes away after delivery.
Preeclampsia: A serious condition with new high blood pressure after 20 weeks, combined with signs of organ damage (such as protein in the urine, low platelets, or kidney/liver problems).
Superimposed Preeclampsia: When a woman with chronic hypertension develops preeclampsia during pregnancy.
Why Does It Matter?
Uncontrolled high blood pressure in pregnancy can lead to serious complications, including:
Stroke or seizures (eclampsia)
Premature birth
Placental abruption (placenta separating early)
Slow fetal growth
HELLP syndrome (a severe form of preeclampsia)
Long-term increased risk of heart disease for the mother
Can Preeclampsia Be Prevented?
For women at high risk, taking low-dose aspirin (81 mg daily) starting between 12 and 28 weeks of pregnancy (ideally by 16 weeks) has been shown to reduce the risk of preeclampsia. Your doctor will determine if aspirin is right for you based on your risk factors.
How is it Treated?
Blood pressure medications: Safe medications like labetalol, nifedipine, or methyldopa are used to keep blood pressure controlled. Based on the 2022 CHAP study, ACOG now recommends treating blood pressure ≥140/90 mmHg in pregnancy.
Close monitoring: Frequent prenatal visits, blood tests, and fetal monitoring.
Delivery: The only cure for preeclampsia is delivery. Timing depends on how severe the condition is and how far along the pregnancy is.
After Delivery
Blood pressure often remains elevated or can worsen in the first few days after delivery. Women who had hypertension in pregnancy have a 2–4 times higher lifetime risk of heart disease and stroke. Long-term follow-up with a primary care provider or cardiologist is strongly recommended.
Important: This information is for educational purposes only. Always consult with your OB/GYN or Maternal-Fetal Medicine specialist for personalized medical advice.