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Placental abruption

3-minute read

Placental abruption occurs when some or all of the placenta peels away from the wall of the uterus before your baby is born. It is a medical emergency and if you experience any bleeding or severe abdominal pain, you need to contact your doctor or midwife immediately.

Placental abruption often happens very suddenly. It can cause pain and heavy bleeding and can also deprive the baby of oxygen and nutrients. It can result in serious complications for the mother including bleeding, shock and kidney problems, and threaten the life of the baby.

Although placental abruption can happen from 20 weeks into pregnancy, almost half of them occur after 37 weeks when the mother is closer to full term. In Australia, it affects about 1 in every 100 to 200 pregnancies.

What causes placental abruption?

The causes of placental abruption aren’t known and it is usually nothing that the mother has done to cause it. Serious injury to the abdomen, such as a fall or car accident is thought to be one cause, but often the reason is unknown.

Some some risk factors that may slightly influence the chance of your having a placental abruption, including if:


What are the symptoms of placental abruption?

Placental abruption can cause bleeding during the second half of pregnancy. The amount of bleeding varies from woman to woman. But it doesn’t necessarily indicate how severe the abruption is because sometimes the blood might be trapped behind the placenta and not actually come out of the vagina.

The other main symptom is severe abdominal pain and tends to be a constant pain, rather than coming in waves like contractions. Some women may have no bleeding, but sudden, severe abdominal pain.

How is placental abruption treated?

If your placenta comes away from the uterus, your baby may be at risk because of the lack of oxygen. There is also a risk that you have bleeding inside your uterus. In either case, this is an emergency and you will need to go to hospital.

If only a small part of the placenta has come away, treatment might involve monitoring you and your baby. You may need to stay in bed. In more serious cases, the baby may need to be delivered, usually by caesarean.

If you have any vaginal bleeding during the second or third trimester, it’s important to see your doctor as soon as possible. If the bleeding is severe or you have significant constant pain, call triple zero (000) for an ambulance or go to your nearest hospital emergency department.

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Last reviewed: February 2020


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Need more information?

Placental abruption - Better Health Channel

betterhealth.vic.gov.au

Read more on Better Health Channel website

Placental insufficiency

Placental insufficiency occurs when the placenta does not work properly and your baby doesn't get the oxygen and nutrients they need.

Read more on Pregnancy, Birth & Baby website

Placenta previa - Better Health Channel

betterhealth.vic.gov.au

Read more on Better Health Channel website

Placenta complications in pregnancy

The placenta develops inside the uterus during pregnancy and provides your baby with nutrients and oxygen. If something goes wrong, it can be serious.

Read more on Pregnancy, Birth & Baby website

Causes of Preterm Labour - Miracle Babies

There are many causes of preterm birth

Read more on Miracle Babies Foundation website

What is the placenta?

The placenta is crucial to keeping your baby alive and well during pregnancy. Read more here.

Read more on Pregnancy, Birth & Baby website

Bleeding during pregnancy

Bleeding during pregnancy is relatively common, however you should always contact your midwife or doctor immediately if it happens to you.

Read more on Pregnancy, Birth & Baby website

Signs of premature labour

Preterm labour is when you go in to labour before your pregnancy reaches 37 weeks.

Read more on Pregnancy, Birth & Baby website

Postpartum haemorrhage

Postpartum haemorrhage is when you bleed more than normal after the birth. It can be very serious and requires medical attention right away.

Read more on Pregnancy, Birth & Baby website

RANZCOG - Pre-eclampsia and High Blood Pressure During Pregnancy

Pre-eclampsia is a serious condition that only occurs in pregnant women. It begins after 20 weeks gestation and usually takes the form of high blood pressure and abnormal kidney function, but can also involve other organs, such as the liver, blood and brain.

Read more on RANZCOG - Royal Australian and New Zealand College of Obstetricians and Gynaecologists website

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The information is not a substitute for independent professional advice and should not be used as an alternative to professional health care. If you have a particular medical problem, please consult a healthcare professional.

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