What is Conjugated Bilirubin?
Bilirubin is a familiar word to new mothers. If bilirubin is not excreted by livers cells, the skin and eyes can take on a yellow color due to the pigment in bilirubin. This condition is known as jaundice. Jaundice occurs in a high percentage of newborns as the body gets used to working outside the womb, but it can also occur in adults with liver disease, alcoholism and other conditions that affect liver function.

Conjugated bilirubin has been changed to glucuronic acid, and other substances. If levels of conjugated bilirubin are high, it could be an indication of hepatocellular or obstructive jaundice.

Normal Value Range

  • Negative Pregnancy Adult: 0.1 to 0.4 mg/dL or 1.7 to 6.8 µmol/L
  • Pregnancy Trimester One: 0 to 0.1 mg/dL or 0 to 1.7 µmol/L
  • Pregnancy Trimester Two: 0 to 0.1 mg/dL or 0 to 1.7 µmol/L
  • Pregnancy Trimester Three: 0 to 1.7 mg/dL or 0 to 1.7 µmol/L

Higher bilirubin measurements can be associated with hepatitis, biliary diseases, neoplastic states, cirrhosis, cholestatic drug reactions, Rotor syndrome or Dubin-Johnson syndrome.

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