FCA1-0378

At 37 weeks’ gestation, a 29-year-old parturient is admitted to the labour ward. Her antenatal period was asymptomatic for her. The haematological values listed below are available: Hb concentration of 100 g/L (115-165), 200×109/L platelets (150-400), MCV 81 fL (80-96). Which of the following is the most likely reason for the problem?