Elevated Liver Enzymes in Pregnancy: What Could It Mean?

Elevated liver enzymes in pregnancy can have very different meanings depending on which result is raised. Alkaline phosphatase (ALP) can be higher than usual simply because of pregnancy, but other changes in liver blood tests can be linked to conditions that need monitoring, such as intrahepatic cholestasis of pregnancy or pre-eclampsia. The care team reads the results together with symptoms, blood pressure, urine tests and how far along the pregnancy is.

This guide is for people who have been told a liver blood test is raised during pregnancy. It explains the main possibilities named by NHS, RCOG and MedlinePlus pages and the questions worth asking. It cannot say what a result means for you or your baby; only the team caring for you can do that.

Do not wait for a routine appointment or repeat blood test if you notice any of the warning signs below. The NHS advises calling your maternity unit if you are pregnant and have symptoms of pre-eclampsia, or calling 111 (or your local equivalent) if you have recently given birth or cannot reach the unit. Outside the UK, use your local maternity or emergency services.

MedlinePlus advises that symptoms of HELLP syndrome during pregnancy need prompt care, including calling emergency services or going to the labour and delivery unit.

• A severe headache that does not go away with simple painkillers.
• Vision problems, such as blurred vision or seeing flashing lights.
• Pain below the ribs or in the upper right or middle of the abdomen.
• Sudden swelling of the face, hands or feet, feeling very unwell, or being sick (vomiting).
• Heartburn that does not go away with heartburn medicines.
• Very itchy skin, itching on the palms of the hands or soles of the feet, or itching that is worse at night.
• Your baby moving less than usual, a change in their usual pattern, or no movement. The NHS says not to wait until the next day, even in the middle of the night.
• Bleeding that will not stop easily, or a seizure: call emergency services.

MedlinePlus states that pregnancy can cause higher than normal ALP levels. So an ALP result above the laboratory's standard range does not, on its own, point to a liver problem during pregnancy.

ALP is only one part of a liver panel, which may also include enzymes such as ALT and AST, bilirubin and sometimes bile acids. Ask which specific result was flagged, by how much, and whether the clinician sees it as an expected pregnancy change or something to follow up. Reference ranges differ between laboratories, so compare a result with the range printed on your own report rather than one found online.

Intrahepatic cholestasis of pregnancy (ICP), also known as obstetric cholestasis, is a liver condition in which bile acids build up in the blood. RCOG describes its main symptom as itching without a rash, usually starting in the third trimester. The itching may include the palms and soles and tends to be worse at night. Rarely, jaundice (yellowing of the skin or eyes) can develop.

Itching in pregnancy is common and often caused by hormone changes and stretching skin, according to the NHS. That is why the care team usually examines the skin and checks blood tests for liver function and bile acids. RCOG notes that bile acids can be raised even when other liver tests are normal, and that tests may be repeated if itching continues without another explanation.

If ICP is diagnosed, RCOG says care should be with an obstetrician, blood tests are usually repeated, and a personalised plan is made. RCOG explains that any extra risk to the baby depends on the bile acid level and other factors, which is why the plan is individual. Keep monitoring your baby's movements and contact the maternity unit straight away if you are worried.

Pre-eclampsia is a condition that affects some pregnancies, usually first noticed as high blood pressure and protein in the urine at routine checks. The NHS lists HELLP syndrome as a possible serious complication, describing it as a rare liver and blood disorder.

HELLP stands for haemolysis (breakdown of red blood cells), elevated liver enzymes and low platelets. MedlinePlus explains it usually develops in the third trimester and can sometimes develop in the week after birth. Liver function tests are often raised and the platelet count is often low, so the team looks at liver results alongside the full blood count, blood pressure and urine.

Because a raised liver enzyme can be part of a wider picture, ask whether your blood pressure, urine protein and platelets were checked at the same time. If low platelets were also reported, a separate guide on low platelets in pregnancy covers that result.

Follow-up depends on which result was raised and why. For ICP, RCOG says blood tests are usually repeated after about one week once the diagnosis is made. If itching continues and no cause is found, tests may be repeated, and a liver scan or specialist referral may be offered if symptoms are unusual, start very early, or do not settle after birth.

After birth, RCOG explains that symptoms of ICP usually improve, but blood tests can take several weeks to return to normal. At the six-week postnatal check, a healthcare professional should confirm the itching has gone and arrange liver and bile acid blood tests. RCOG also advises checking liver tests and bile acids early in any future pregnancy.

A trend over time, symptoms and the overall clinical picture usually tell the team more than a single value. If you are unsure whether a repeat test has been arranged, ask who will order it and when the results will be reviewed.

Writing these down before an appointment can help, especially if results arrive through a patient portal without an explanation.

• Which liver result was raised: ALP, ALT, AST, bilirubin or bile acids?
• Is this change expected in pregnancy, or does it need follow-up?
• Were my blood pressure, urine protein and platelet count checked at the same time?
• Do I need a bile acid test, and when will it be repeated?
• What symptoms should make me call the maternity unit straight away?
• Does this result change my plan for monitoring, scans or timing of birth?
• Who will check my liver blood tests after the birth, and when?

On SameCase, patients and verified doctors share de-identified cases. Reading how others with a similar result described their tests, symptoms and follow-up may help you notice questions you had not thought to ask. Similar cases cannot tell you what your own result means or predict how your pregnancy will go. Take any questions to your own maternity team, who know your full history and results.