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Preeclampsia Warning Signs During Pregnancy and After Birth

Preeclampsia can develop after 20 weeks of pregnancy and may continue or appear after birth. Learn which symptoms need urgent care, how clinicians assess it and what to ask at follow-up.

In this guide

What is preeclampsia, and when can it happen?

Preeclampsia is a serious pregnancy-related blood-pressure disorder that usually begins after 20 weeks. It can affect the pregnant woman’s organs and the baby, and it can progress to seizures. It may also continue or first become noticeable after birth, so new severe symptoms after delivery need medical assessment.

Routine checks matter even when you feel well

Some people have no clear warning symptoms. Antenatal blood-pressure checks and urine testing can help a clinician identify a problem. Attend scheduled pregnancy visits where possible, and ask when and where the next check will happen if travel, cost, work or childcare makes attendance difficult.

Know the warning signs

Seek urgent medical advice for a severe or persistent headache, blurred vision or flashing spots, severe pain under the ribs or in the upper abdomen, sudden swelling of the face or hands, breathing difficulty, or feeling very unwell. These signs can have other causes, but they should not be dismissed during pregnancy or after birth.

Blood-pressure and symptom follow-up record
Date and pregnancy / birth weekBP reading and timeHeadache / vision / upper painMedicine and dose as prescribedClinician contactedNext review

How is preeclampsia assessed?

A clinician considers blood pressure, pregnancy timing, symptoms and signs that organs may be affected. One home reading or a symptom search cannot diagnose or rule out preeclampsia.

Do not start prevention or blood-pressure medicine yourself

A clinician may discuss a preventive medicine or treatment based on personal risk and test results. Do not start aspirin, calcium tablets, blood-pressure medicines or someone else’s prescription without medical advice, and do not stop a prescribed medicine abruptly.

Treatment and care after delivery

Care depends on severity, pregnancy stage, test results and the health of the woman and baby. The team may monitor closely, use medicines or recommend delivery when that is the safest option. Only the treating team can weigh those choices for a particular pregnancy.

Preeclampsia: frequently asked questions

Words you can use

Ask for an urgent blood-pressure review

A severe or unusual symptom starts during pregnancy or after birth

“I am [pregnant at about ___ weeks / ___ days or weeks after birth]. Since [time], I have [headache, vision change, upper abdominal pain, swelling, breathlessness or other symptom]. My last blood-pressure reading was [if known]. Please tell me where to be assessed now. If I have a seizure, collapse or severe breathing problem, we are calling 112.”