Preeclampsia cannot be cured during pregnancy. The only definitive treatment is delivering the baby. But depending on how far along you are and how severe the condition is, there are real steps that reduce risk beforehand, manage blood pressure during pregnancy, and protect both you and your baby until delivery is safe. Here’s what actually helps.
What Preeclampsia Is and How It’s Diagnosed
Preeclampsia is a blood pressure disorder that develops after 20 weeks of pregnancy. It’s diagnosed when blood pressure reaches 140/90 mmHg or higher on two separate readings taken at least four hours apart in someone who previously had normal blood pressure. In many cases, excess protein also shows up in the urine, typically 300 mg or more in a 24-hour collection, though that’s not always required for diagnosis. The condition can also involve signs of kidney, liver, or blood problems even without significant protein in the urine.
What makes preeclampsia dangerous is that it can progress quickly. Mild cases may stay stable for weeks, but severe cases can cause organ damage, seizures (called eclampsia), or life-threatening complications for both mother and baby within days or even hours.
Preventing Preeclampsia Before It Starts
If you’re at high risk due to a previous preeclampsia diagnosis, chronic high blood pressure, diabetes, kidney disease, or carrying multiples, daily low-dose aspirin is the most evidence-backed prevention strategy. The U.S. Preventive Services Task Force recommends 81 mg per day, started after 12 weeks of gestation and ideally before 20 weeks. This won’t eliminate risk entirely, but it meaningfully reduces the chances of developing the condition.
Calcium supplementation also has strong evidence behind it. In placebo-controlled trials, taking at least 1,000 mg of calcium daily reduced the risk of preeclampsia by more than half and lowered the risk of preterm birth by 24%. This benefit is most pronounced in women whose calcium intake is already low, which is common in many parts of the world. If you’re not getting enough calcium through food, a supplement is worth discussing with your provider early in pregnancy.
Managing Preeclampsia During Pregnancy
Once preeclampsia is diagnosed, the goal shifts to keeping blood pressure controlled and monitoring for signs of worsening while buying time for the baby to mature. What that looks like in practice depends on the severity and your gestational age.
For mild preeclampsia before 37 weeks, management often means frequent blood pressure checks, blood tests to monitor your liver and platelet counts, and urine tests. You may be seen one to two times per week, sometimes more. Your provider will also monitor the baby more closely using tools like the nonstress test, which tracks the baby’s heart rate patterns, and the biophysical profile, an ultrasound-based assessment that scores fetal breathing, movement, muscle tone, and amniotic fluid levels. A score of 8 or 10 out of 10 is reassuring. A score of 6 is borderline, and 4 or below signals a problem. If the baby isn’t growing well, umbilical artery Doppler ultrasound can assess how well blood is flowing through the placenta.
For severe preeclampsia, hospitalization is common. Blood pressure medications safe for pregnancy are used to bring dangerously high readings down. Magnesium sulfate is given through an IV to prevent seizures. It works by relaxing blood vessels, protecting the barrier between the bloodstream and the brain, and raising the threshold for seizure activity. You’ll likely stay on it during delivery and for at least 24 hours afterward. It can cause flushing, warmth, and nausea, but it’s highly effective at preventing eclampsia.
When Delivery Becomes the Treatment
If preeclampsia is diagnosed at or after 37 weeks, delivery is typically recommended promptly, since the baby is considered full-term and the risks of continuing the pregnancy outweigh the benefits. Before 37 weeks, the decision is harder. Providers weigh the severity of the condition against the baby’s gestational age. If the condition is worsening, with blood pressure climbing despite medication, lab values deteriorating, or the baby showing signs of distress, delivery becomes necessary regardless of how early it is.
Between 34 and 37 weeks, the calculus usually favors delivery for severe cases. Before 34 weeks, steroids to accelerate the baby’s lung development are given if there’s time, typically requiring 48 hours to take full effect. In the most serious cases, delivery may need to happen within hours.
Warning Signs That Need Immediate Attention
Preeclampsia can worsen between appointments. Knowing what to watch for matters because early recognition of severe features changes how quickly you’re treated. The red flags include:
- Severe headache that doesn’t respond to rest or typical pain relief
- Vision changes such as blurred vision, seeing spots or flashes, light sensitivity, or temporary vision loss
- Upper belly pain, usually under the ribs on the right side, caused by liver swelling
- Shortness of breath from fluid building up in the lungs
- Nausea or vomiting that comes on suddenly in the second half of pregnancy
- Mental confusion or altered behavior, which can signal that seizures are imminent
Any of these symptoms warrants an emergency room visit, not a call to schedule an appointment.
Postpartum Preeclampsia Is Real
Many people assume the risk ends once the baby is born. It doesn’t. Most cases of postpartum preeclampsia develop within 48 hours of delivery, but it can appear up to six weeks later, sometimes in women who had no blood pressure problems during pregnancy at all. The symptoms are the same: severe headaches, vision changes, upper belly pain, shortness of breath, and swelling that seems disproportionate to normal postpartum recovery.
This catches people off guard because the focus after birth shifts to the baby. If you had preeclampsia during pregnancy, your blood pressure will be monitored closely in the days after delivery. But even if your pregnancy was uncomplicated, any of the warning signs listed above in the weeks after birth should be taken seriously.
Long-Term Health After Preeclampsia
Preeclampsia isn’t just a pregnancy complication that resolves and disappears. Women who’ve had it face a two to fourfold increased risk of chronic high blood pressure, heart disease, stroke, heart failure, and peripheral artery disease later in life. The more severe the preeclampsia and the earlier it developed during pregnancy, the higher the long-term cardiovascular risk.
This doesn’t mean heart disease is inevitable. It means preeclampsia is an early signal that your cardiovascular system may need closer attention over the years. Regular blood pressure monitoring, maintaining a healthy weight, staying physically active, and managing cholesterol and blood sugar all become more important. Many women aren’t told about this connection, so it’s worth bringing up with a primary care provider well after the pregnancy is over. Treating a history of preeclampsia as a cardiovascular risk factor, the same way you’d treat a family history of heart disease, is one of the most practical long-term steps you can take.