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Pregnancy-induced high blood pressure (pre-eclampsia)

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Health Centres - Pregnancy-induced high blood pressure (pre-eclampsia)

What is pre-eclampsia? © NetDoctor/Justesen
Reviewed by Dr Philip Owen, consultant obstetrician and gynaecologist

What is pre-eclampsia?

Up to 1 in 10 pregnant women develop raised blood pressure accompanied by the appearance of protein in the urine (proteinuria) and retention of excessive amounts of fluid in the body (oedema). It is not usually seen before the sixth month of pregnancy and most women develop the condition at the end of their pregnancy. However, only 1 out of 100 women will have the severe form of the condition.

Pre-eclampsia can also occur up to a week following delivery of the baby.

Why does this occur?

It is still not known why certain women develop high blood pressure during pregnancy.

Certain pre-existing conditions increase the risk of developing high blood pressure. They include:

- first pregnancy
- diabetes
- essential hypertension (high blood pressure before pregnancy)
- chronic kidney diseases
- previous pregnancies affected by pre-eclampsia
- carrying twins or triplets.

What are the symptoms?

Hypertension (high blood pressure) Unless her blood pressure is very high, a woman will not be aware that it has increased. As a general rule a blood pressure greater than 140/90mmHg in pregnancy is considered to be raised.

Very high blood pressure (greater than 170/110mmHg)

Often accompanied by headaches and the appearance of flashing lights before the eyes. Measuring a woman's blood pressure is an essential part of any antenatal clinic visit.

Protein in the urine

This is detected by your doctor or midwife by using a special stick to dip into a clean sample of urine. There are other causes of proteinuria but pre-eclampsia is the cause with most significance for the mother and foetus.

Sudden or insidious weight gain with swollen hands, feet , face or other parts of the body

Some swelling is normal in pregnancy but it should prompt a woman to have her blood pressure and urine checked.

Pain in the right upper abdomen

May indicate involvement of the liver, which in severe cases can be complicated by an imbalance of the coagulation system that causes an increased or decreased ability of the blood to clot.



The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care or attention by a qualified practitioner. The materials in this web site cannot and should not be used as a basis for diagnosis or choice of treatment. Conditions for use Powered by netdoctor
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