Preeclampsia

Preeclampsia is a serious pregnancy complication that can affect both mother and baby. When blood pressure rises dangerously during pregnancy and vital organs begin to show signs of stress, swift medical attention becomes essential. For families navigating a pregnancy affected by preeclampsia or seeking to understand how this condition may have contributed to a birth injury, clear information can help make sense of a difficult experience and guide decisions about care and support.

This resource page explains what preeclampsia is, how it develops, what warning signs to watch for, and how medical teams work to protect the health of both mother and child.

What is Preeclampsia

Preeclampsia is a pregnancy-specific condition that typically appears after the 20th week of pregnancy. It is defined by new-onset high blood pressure combined with signs that organs such as the kidneys or liver are not functioning properly. In many cases, protein appears in the urine, a sign that the kidneys are under strain.

This condition affects approximately 3 to 8 percent of pregnancies in the United States and around the world. While many cases are mild and manageable with careful monitoring, preeclampsia can progress quickly and become life-threatening for both mother and baby if not recognized and treated promptly.

Preeclampsia is one of the leading causes of maternal illness and death, as well as preterm birth and complications for newborns. Understanding the condition and its warning signs is an important part of prenatal care.

Why Preeclampsia Develops

The exact cause of preeclampsia remains incompletely understood, but researchers believe it begins early in pregnancy with problems in how the placenta forms and connects to the mother’s blood vessels.

Normally, the placenta develops a rich network of blood vessels that allow oxygen and nutrients to reach the growing baby. In preeclampsia, this process does not occur properly. The placenta may not invade deeply enough into the uterine wall, leading to poor blood flow. This triggers a cascade of problems, including inflammation, blood vessel dysfunction, and rising blood pressure throughout the mother’s body.

The placenta becomes stressed and releases substances into the mother’s bloodstream that damage the lining of blood vessels. This widespread vascular injury affects multiple organ systems and leads to the dangerous symptoms associated with preeclampsia.

Risk Factors

While any pregnant woman can develop preeclampsia, certain factors increase the likelihood. Recognizing these risk factors helps healthcare providers identify women who may benefit from closer monitoring or preventive treatment.

Pregnancy-related factors:

• First pregnancy
• History of preeclampsia in a previous pregnancy
• Pregnancy with twins, triplets, or more
• Pregnancy conceived through in vitro fertilization, particularly after frozen embryo transfer
• New partner or long interval since last pregnancy

Medical conditions:

• Chronic high blood pressure
• Kidney disease
• Diabetes (Type 1 or Type 2)
• Autoimmune disorders such as lupus or antiphospholipid syndrome
• Obesity

Demographic factors:

• Maternal age over 35 (risk increases significantly)
• Family history of preeclampsia (mother or sister)
• Black race, due in part to systemic health disparities and chronic stress

Women with multiple risk factors face a higher likelihood of developing preeclampsia and may benefit from early intervention strategies.

Symptoms and Warning Signs

One of the challenges with preeclampsia is that many women feel completely fine, especially in the early stages. High blood pressure and organ changes can develop silently. This is why regular prenatal checkups that include blood pressure measurement and urine testing are so important.

When symptoms do appear, they may include:

• Persistent or severe headache that does not improve with usual remedies
• Changes in vision such as blurriness, flashing lights, or temporary loss of vision
• Pain in the upper right side of the abdomen, just below the ribs
• Sudden swelling of the face, hands, or feet
• Rapid weight gain from fluid retention (more than 2 pounds in a week)
• Nausea or vomiting, especially in the second half of pregnancy
• Difficulty breathing or shortness of breath
• Decreased urination

Any of these symptoms warrant immediate contact with a healthcare provider. Preeclampsia can worsen quickly, and timely evaluation can prevent serious complications.

How Preeclampsia is Diagnosed

Healthcare providers diagnose preeclampsia based on clinical criteria established by the American College of Obstetricians and Gynecologists and the World Health Organization.

The primary diagnostic criteria include:

Blood pressure elevation: A systolic blood pressure of 140 mm Hg or higher, or a diastolic blood pressure of 90 mm Hg or higher, measured on two occasions at least four hours apart after 20 weeks of pregnancy.

Proteinuria: The presence of 300 milligrams or more of protein in a 24-hour urine collection, or a protein-to-creatinine ratio of 0.3 or higher in a single urine sample.

However, preeclampsia can also be diagnosed without proteinuria if high blood pressure occurs along with other signs of organ dysfunction, such as:

• Kidney problems (elevated creatinine, reduced urine output)
• Liver involvement (elevated liver enzymes, right upper abdominal pain)
• Neurological symptoms (severe headache, visual changes, altered mental status)
• Low platelet count
• Fluid in the lungs

Preeclampsia is further classified as preeclampsia with severe features when blood pressure is extremely high (systolic ≥160 or diastolic ≥110 mm Hg) or when there are signs of serious organ damage. Severe preeclampsia requires urgent medical attention and often hospitalization.

Preventing Preeclampsia

While there is no guaranteed way to prevent preeclampsia, certain measures can reduce the risk, particularly for women with known risk factors.

Low-dose aspirin: Research shows that taking a daily low-dose aspirin (typically 81 mg) starting before 16 weeks of pregnancy can reduce the risk of preeclampsia in high-risk women. Providers use risk assessment tools to identify candidates for aspirin therapy. This simple intervention can make a meaningful difference for those at elevated risk.

Prenatal care: Early and consistent prenatal visits allow healthcare providers to monitor blood pressure and urine protein, catch changes early, and intervene before preeclampsia becomes severe.

Managing chronic conditions: Women with high blood pressure, diabetes, or kidney disease benefit from optimizing their health before pregnancy and maintaining careful control during pregnancy.

Healthy lifestyle: Maintaining a healthy weight, eating a balanced diet, and staying physically active can support overall pregnancy health, though these measures alone do not eliminate preeclampsia risk.

Family history awareness: Women with a family history of preeclampsia should discuss this with their provider early in pregnancy to inform monitoring and prevention plans.

Medical Care and Treatment

The only definitive cure for preeclampsia is delivery of the baby and placenta. However, the timing of delivery depends on the severity of the condition and how far along the pregnancy is. Medical teams must balance the risks of continuing the pregnancy against the risks of preterm birth for the baby.

Monitoring and observation

Women with mild preeclampsia who are not yet near their due date may be monitored closely with:

• Frequent blood pressure checks
• Regular urine protein testing
• Blood tests to assess liver and kidney function and platelet counts
• Ultrasounds to monitor fetal growth and amniotic fluid levels
• Fetal heart rate monitoring (non-stress tests)

Some women can be monitored at home with modified activity or bed rest, while others require hospitalization for closer observation.

Medications

Antihypertensive medications may be prescribed to lower dangerously high blood pressure and reduce the risk of stroke. Commonly used medications include labetalol, nifedipine, and hydralazine.

Magnesium sulfate is given intravenously to prevent seizures (eclampsia) in women with severe preeclampsia. This medication is typically started during labor and continued for 24 hours after delivery.

Corticosteroids may be administered if preterm delivery is anticipated, to help mature the baby’s lungs and reduce the risk of breathing problems after birth.

Delivery

When preeclampsia is severe or when the pregnancy has reached a safe gestational age, delivery is the safest option. This might mean:

• Inducing labor if the cervix is favorable and vaginal delivery is possible
• Cesarean delivery if induction is not safe or successful, or if fetal or maternal status is concerning

Delivery is generally recommended by 37 weeks for women with preeclampsia without severe features, and earlier for those with severe features, depending on maternal and fetal stability.

After delivery, blood pressure is monitored closely, as preeclampsia can persist or even worsen in the days following birth. Most women see improvement within days to weeks, but some require continued treatment.

Risks and Complications

Preeclampsia carries significant risks for both mother and baby, particularly when the condition is severe or not recognized and treated promptly.

Maternal complications include:

• Eclampsia (seizures)
• Stroke
• HELLP syndrome (a severe variant involving hemolysis, elevated liver enzymes, and low platelets)
• Liver rupture or failure
• Kidney failure
• Pulmonary edema (fluid in the lungs)
• Placental abruption (premature separation of the placenta)
• Disseminated intravascular coagulation (severe clotting disorder)
• Death

Fetal and neonatal complications include:

• Fetal growth restriction due to poor placental blood flow
• Preterm birth and related complications such as respiratory distress, bleeding in the brain, and developmental delays
• Low birth weight
• Stillbirth
• Neonatal intensive care unit admission

Globally, preeclampsia contributes to more than 50,000 maternal deaths and 500,000 fetal and newborn deaths each year. In the United States, it accounts for a substantial share of maternal deaths and intensive care admissions, particularly among Black women and women with limited access to quality prenatal care.

In New York City, public health initiatives emphasize the importance of timely recognition and specialized multidisciplinary care, especially in communities at higher risk for adverse outcomes.

Long-Term Health Considerations

Preeclampsia does not simply end with delivery. Women who have had preeclampsia face increased long-term health risks and should be aware of the need for ongoing monitoring.

Cardiovascular health: Women with a history of preeclampsia are at higher risk for high blood pressure, heart disease, and stroke later in life. This risk is even greater for those who had severe preeclampsia, early-onset preeclampsia, or preterm delivery. Regular checkups, blood pressure monitoring, and heart-healthy lifestyle choices are important.

Kidney health: Some women experience lasting kidney damage or develop chronic kidney disease. Periodic kidney function testing may be recommended.

Future pregnancies: Women who have had preeclampsia have a higher likelihood of developing it again in future pregnancies, though not all will. Close monitoring and preventive measures such as low-dose aspirin can reduce recurrence risk.

Children born to mothers with preeclampsia: Some studies suggest these children may face a slightly higher risk of high blood pressure, metabolic conditions, or developmental challenges, particularly if they were born preterm or growth-restricted. Pediatric follow-up is important.

Healthcare providers should counsel women with a history of preeclampsia about these risks and work with them to manage modifiable factors like diet, exercise, smoking, and weight.

Support and Resources for Families

A diagnosis of preeclampsia can be frightening and overwhelming. Families may worry about the health of the mother, the baby, or both. If preterm delivery becomes necessary, parents may face the stress of a newborn in the neonatal intensive care unit.

Emotional support, clear communication from the healthcare team, and connection to community resources can make a significant difference during and after a complicated pregnancy.

What families can do:

• Ask questions and make sure you understand your care plan, medications, and warning signs to watch for
• Seek support from family, friends, or counseling services if you feel anxious or overwhelmed
• Connect with other families who have experienced preeclampsia through support groups or online communities
• If your baby is born preterm, work closely with the NICU team and ask about developmental follow-up services
• Keep postpartum appointments and continue monitoring your blood pressure and overall health after delivery
• Advocate for yourself if you feel something is not right

NYbirthinjury.com exists to provide trusted, compassionate information and to help families connect with qualified medical and support resources as they navigate birth injuries, pregnancy complications, and the care of affected children.

Moving Forward with Knowledge and Care

Preeclampsia is a serious condition, but with attentive prenatal care, prompt recognition, and appropriate medical treatment, the vast majority of mothers and babies do well. Understanding the symptoms, knowing your risk factors, and maintaining open communication with your healthcare team are your best tools.

If you or someone you love has been affected by preeclampsia, know that you are not alone. Thousands of families face this diagnosis each year, and support, information, and expert care are available.