The rate of high blood pressure during pregnancy increased by 73 percent between 2016 and 2024, affecting approximately one in 10 pregnancies in the U.S., according to the Centers for Disease Control and Prevention. This condition, which includes gestational hypertension and preeclampsia, poses severe risks to maternal and infant health.
Understanding the Rising Tide of Pregnancy Hypertension
Upon hospital admission, her blood pressure spiked to a dangerous 220/120 millimeters of mercury (mm Hg), leading to a severe diagnosis of preeclampsia and an emergency delivery more than a month early. O'Grady's experience reflects a much broader national trend.
Data from the U.S. Centers for Disease Control and Prevention (CDC) reveals that hypertension rates during pregnancy climbed by 73 percent between 2016 and 2024. Gestational hypertension—high blood pressure developing for the first time during pregnancy—has steadily increased since 1989, when the condition was first recorded on birth certificates. According to Sarah Kilpatrick, a maternal fetal medicine specialist at Cedars-Sinai in Los Angeles, this upward trajectory stems from multiple converging factors. The average age of people’s first pregnancy is rising, more people over 40 are having babies, twin and triplet pregnancies facilitated by in vitro fertilization are more frequent, and average body mass indexes (BMIs) have risen consistently.
In Plain English: The Clinical Takeaway
- Gestational Hypertension: High blood pressure that develops after 20 weeks of pregnancy without protein in the urine, typically monitored weekly and managed closely to prevent progression.
- Preeclampsia: A systemic pregnancy complication marked by high blood pressure combined with signs of liver or kidney damage, requiring rigorous tracking of both maternal and fetal well-being.
- Systemic Impact: The condition involves an abnormal placental response—specifically an increase in a protein called sFlt-1—that can compromise blood flow and organ function if not diagnosed promptly.
Clinical Categories, Diagnostic Criteria, and Regional Disparities
Medical literature outlines distinct classifications for hypertensive disorders during pregnancy. Chronic hypertension involves elevated blood pressure present before pregnancy or diagnosed before week 20. Gestational hypertension emerges after week 20, characterized by systolic readings of at least 140 mm Hg or diastolic readings of at least 90 mm Hg, without accompanying proteinuria or other heart or kidney problems. When high blood pressure coincides with signs of systemic organ injury—such as abnormal liver enzymes or low platelet counts—the condition is classified as preeclampsia.
According to the CDC report, gestational hypertension rates in 2024 were disproportionately high among Native American and Black women, individuals aged 40 and older, and those classified clinically as “obese”. Baha Sibai, a maternal fetal medicine specialist at the University of Texas Health Science Center at Houston, notes that actual incidence figures may be even higher due to incomplete data collection on standard birth certificates. Sibai emphasizes the necessity of tracking how many weeks the pregnancy reached before birth to evaluate patient risk accurately.
| Condition | Onset Timing | Diagnostic Threshold | Key Complications |
|---|---|---|---|
| Chronic Hypertension | Pre-pregnancy or before week 20 | Not specified | Not specified |
| Gestational Hypertension | After week 20 of gestation | >140/90 mm Hg (no proteinuria) | Possible progression to preeclampsia, preterm delivery |
| Preeclampsia | Typically after week 20 or postpartum | High BP + signs of organ damage in blood/urine | HELLP syndrome, stroke, renal impairment, eclampsia |
Contraindications & When to Consult a Doctor
Individuals should immediately seek emergency medical attention if they experience symptoms of preeclampsia or HELLP syndrome.
Unmanaged hypertension can lead to serious health complications; healthcare providers may determine a person with preeclampsia needs to deliver early to reduce the risk of severe complications. Routine prenatal checkups remain vital, as hypertension can manifest insidiously without obvious early symptoms, threatening both maternal and neonatal safety.
The Evolving Focus of Maternal Care
Clinical management has shifted. While previous focus was on managing the pregnancy, there is now a big emphasis on reducing morbidity in the woman. As researchers continue to dissect the molecular pathways involving placental proteins and vascular resistance, early screening and rigorous blood pressure monitoring remain tools in mitigating complications.
Keep reading
- Early Relapsing MS Linked to Subtle Brain White Matter Changes
- Bipartisan Effort Saves Troy, N.Y.’s Last Birthing Center from Closure
- Neighborhood Poverty and Pollution Linked to Higher Breast Cancer Risks (time.news)
- Cal Poly Chabad and Mustangs United for Israel Host “Rising to the Challenge” Event (archynewsy.com)
