uk-drcog MCQ (SBA): Acute Fatty Liver of Pregnancy

A 24-year-old woman at 30 weeks of gestation presents to the GP with a 2-week history of epigastric pain and vomiting. She has normal blood pressure and no proteinuria. Bloods show: ALT 180 U/L, AST 150 U/L, bilirubin 42 µmol/L, glucose 2.8 mmol/L, white cell count 16 × 10⁹/L, and platelets 180 × 10⁹/L. Bile acids are normal. What is the most likely diagnosis?