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Symptoms

Pre-eclampsia rarely happens before the 20th week of pregnancy.

Although less common, the condition can also develop for the first time in the first 4 weeks after birth.

Most people only experience mild symptoms, but it's important to manage the condition in case severe symptoms or complications develop.

Generally, the earlier pre-eclampsia develops, the more severe the condition will be.

Early signs and symptoms

Initially, pre-eclampsia causes:

You probably won't notice any symptoms of either of these, but your GP or midwife should pick them up during your routine antenatal appointments.

High blood pressure alone doesn't suggest pre-eclampsia.

But if protein in the urine is found at the same time as high blood pressure, it's a good indicator of the condition.

Read more about diagnosing pre-eclampsia.

Further symptoms

As pre-eclampsia progresses, it may cause:

  • severe headaches
  • vision problems, such as blurring or seeing flashing lights
  • pain just below the ribs
  • vomiting
  • sudden swelling of the feet, ankles, face and hands

If you notice any symptoms of pre-eclampsia, get medical advice immediately by calling your GP surgery or NHS 111.

Without immediate treatment, pre-eclampsia may lead to a number of serious complications, including:

  • convulsions (eclampsia)
  • HELLP syndrome (a combined liver and blood clotting disorder)
  • stroke

But these complications are rare.

Read more about the complications of pre-eclampsia.

Signs in the unborn baby

The main sign of pre-eclampsia in the unborn baby is slow growth. This is caused by poor blood supply through the placenta to the baby.

The growing baby receives less oxygen and fewer nutrients than it should, which can affect development. This is called intra-uterine or foetal growth restriction.

If your baby is growing more slowly than usual, this will normally be picked up during your antenatal appointments, when the midwife or doctor measures you.

Last Reviewed
18 November 2021
NHS websiteNHS website
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Hedgegrail Pharmacy in Stoke Poges offers a wide range of prescription and over-the-counter medications, as well as health and beauty products
Company Registration: 2041755
Premises GPhC: 1099892
Superintendent: Baljit Singh Bahra
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