When confronted with liver abnormalities during the third trimester of pregnancy, one should consider acute fatty liver of pregnancy. The differential diagnosis with (pre-)eclampsia and HELLP syndrome is sometimes difficult. In these cases a liver biopsy is helpful though rarely performed during preg-nancy. After delivery of the child the liver test abnormalities will ultimately disappear. Recent publications reveal that a dysfunction in the b-oxidation of mitochondrial fatty acids may contribute to the aetiology of this rare disorder. We describe a case of acute fatty liver in pregnancy, with liver dysfunction (decreased albumin, prolonged prothrombin time) slowly returning to normal after delivery. Testing for disorders in b-oxidation of mitochondrial fatty acids did not reveal abnormalities in mother or child.