Bile Acids Pregnancy (Serum) Biomarker Testing
It measures total bile acids in your blood to assess pregnancy-related cholestasis risk, with convenient ordering and Quest-based lab collection via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
This test measures the amount of bile acids circulating in your blood during pregnancy. It is most often used when you have itching (especially on your palms or soles) or when your clinician wants to evaluate for intrahepatic cholestasis of pregnancy (ICP).
Bile acids are made in your liver and help you digest fats. In pregnancy, hormone changes can slow bile flow in some people, which can raise bile acids in the bloodstream.
A single number does not tell the whole story. Your symptoms, gestational age, and related liver tests help determine whether you need treatment, closer monitoring, or repeat testing.
Do I need a Bile Acids Pregnancy test?
You may benefit from a bile acids pregnancy test if you develop new, persistent itching without a rash, especially in the third trimester. Many people describe it as worse at night and most noticeable on the hands and feet, although it can be more generalized.
Testing is also commonly considered when you have abnormal liver blood tests (such as elevated ALT or AST), a prior pregnancy affected by cholestasis, a family history of cholestasis, or multiple gestation. If your itching is significant but your first bile acids result is normal, repeat testing is often part of the plan because bile acids can rise later.
This test supports clinician-directed care. It can help your prenatal team decide whether you need closer fetal monitoring, medication to reduce bile acids, or a change in delivery timing based on your overall risk and trend over time.
Bile acids testing is performed in CLIA-certified laboratories; results are educational and should be interpreted with your pregnancy clinician rather than used as a standalone diagnosis.
Lab testing
Order a bile acids pregnancy test and review your results in one place.
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault lets you order a bile acids pregnancy test without waiting for a separate referral, which can be helpful when symptoms change quickly and you want objective data to bring to your prenatal visit.
After you order, you complete your blood draw at a participating Quest location. When results are ready, you can review them in your Vitals Vault dashboard and use PocketMD to ask practical questions like whether a repeat test makes sense, which companion labs can clarify the picture, and how to discuss next steps with your OB or midwife.
If you are already being followed for suspected or confirmed ICP, Vitals Vault can also support trend tracking, since changes over time often matter as much as the first result.
- Order online and draw at a Quest location
- Clear, shareable results for your prenatal team
- PocketMD support for questions and follow-up planning
Key benefits of Bile Acids Pregnancy testing
- Helps evaluate itching in pregnancy for possible intrahepatic cholestasis of pregnancy (ICP).
- Identifies elevated bile acids that may increase pregnancy risk and warrant closer monitoring.
- Supports decisions about repeat testing when symptoms persist but an early result is normal.
- Adds context to liver enzyme changes (ALT/AST) by assessing bile flow rather than liver injury alone.
- Helps you and your clinician track trends over time, which can guide treatment response.
- Improves conversations about delivery timing by pairing symptoms with objective lab data.
- Gives you a fast, organized way to access results and ask PocketMD about next steps.
What is Bile Acids Pregnancy?
Bile acids are substances your liver makes from cholesterol. They are stored in the gallbladder and released into the intestine to help digest and absorb fats. Most bile acids are then reabsorbed and recycled back to the liver.
In pregnancy, rising estrogen and progesterone can slow the normal flow of bile (cholestasis). When bile does not move efficiently, bile acids can build up and spill into the bloodstream. The blood test typically reports total serum bile acids, which reflects the overall amount circulating at the time of the draw.
When bile acids are elevated in pregnancy—especially alongside characteristic itching—your clinician may consider intrahepatic cholestasis of pregnancy (ICP). ICP is a pregnancy-specific condition that can require closer monitoring and, in some cases, medication and planned delivery. Because bile acids can fluctuate, repeat testing and related liver labs are often used to confirm the pattern and assess severity.
Why itching can happen without a rash
With cholestasis, bile acids and related compounds can accumulate in the skin and trigger intense itching even when the skin looks normal. A rash may appear later from scratching, but the primary problem is internal bile flow rather than a skin allergy.
Total bile acids vs. other liver tests
ALT and AST are enzymes that rise when liver cells are stressed or injured, and alkaline phosphatase can be elevated in normal pregnancy. Total bile acids are more directly tied to bile flow and are often the key lab used to evaluate suspected ICP.
What do my Bile Acids Pregnancy results mean?
Low bile acids in pregnancy
A low result is usually not a problem and generally means bile acids are not accumulating in your bloodstream at the time of testing. If you are testing because of itching, a low value does not explain symptoms by itself, and your clinician may look for other causes such as dry skin, eczema, allergic reactions, or other pregnancy-related changes. If itching is persistent or worsening, your clinician may still recommend repeating bile acids because levels can rise later.
In-range (optimal) bile acids in pregnancy
An in-range result makes ICP less likely at that moment, especially if you have mild symptoms. However, bile acids can fluctuate and may lag behind symptoms, so timing matters. If your symptoms are classic for cholestasis or you have a prior history, your clinician may repeat testing and review companion labs to make sure the overall pattern stays reassuring.
High bile acids in pregnancy
A high result suggests bile acids are building up in your blood and raises concern for cholestasis, particularly when paired with itching without a rash. The degree of elevation can influence how your prenatal team monitors you and whether treatment is started, since higher levels are generally associated with higher risk. Your clinician will usually confirm the pattern, review liver enzymes and bilirubin, and discuss monitoring and delivery planning based on your full clinical picture.
Factors that influence bile acids results
Whether you were fasting, the time of day, and how recently you ate can affect bile acids, and different labs may use different reference intervals. Gestational age matters too, since ICP is more common later in pregnancy. Certain liver or gallbladder conditions, hepatitis, and some medications can also raise bile acids, so your clinician may interpret this test alongside ALT, AST, bilirubin, and your symptom history. If you are already on treatment for suspected ICP, your level may change over time, which is why trend testing is often more informative than one isolated value.
What’s included
- Cholic Acid
- Deoxycholic Acid
- Chenodeoxycholic Acid
- Total Bile Acids
Frequently Asked Questions
What is the bile acids pregnancy test used for?
It is used to measure total bile acids in your blood during pregnancy, most often to evaluate itching and assess for intrahepatic cholestasis of pregnancy (ICP). It can also help your clinician monitor severity and trends if ICP is suspected or confirmed.
Do I need to fast for a bile acids test in pregnancy?
Some clinicians prefer a fasting sample because bile acids can rise after eating, but practices vary by lab and clinical scenario. If your order instructions do not specify fasting, ask your prenatal team what they want so your results are easiest to compare over time.
If my bile acids are normal but I’m still itching, what should I do?
A normal result does not always rule out ICP early on. If itching persists or worsens, contact your prenatal clinician; repeat bile acids and companion liver tests are commonly recommended, especially if your symptoms are typical or you have a prior history.
What bile acids level is considered high in pregnancy?
“High” depends on the lab’s reference range and the clinical thresholds your clinician uses for pregnancy management. Your report will show the lab’s interval, and your prenatal team will interpret the degree of elevation in the context of symptoms, gestational age, and repeat values.
What other labs are usually checked with bile acids for suspected cholestasis?
Clinicians often review liver enzymes (ALT, AST), bilirubin, and sometimes alkaline phosphatase and GGT, along with your symptoms and medical history. These tests help distinguish cholestasis patterns from other liver or gallbladder conditions.
How often are bile acids repeated in pregnancy?
There is no single schedule that fits everyone. Repeat testing may be done when symptoms change, when an initial test is normal but suspicion remains, or to monitor response to treatment; your clinician will set timing based on your week of pregnancy and your overall risk.
Can bile acids be elevated for reasons other than ICP?
Yes. Other liver or biliary conditions, viral hepatitis, gallbladder disease, and certain medications can affect bile acids. That is why clinicians interpret bile acids alongside liver enzymes, bilirubin, and your clinical history.