MSFinals-3601

A 25-year-old woman who is 28 weeks pregnant attends the joint antenatal and diabetes clinic for a review of her gestational diabetes. She was diagnosed with gestational diabetes at 24 weeks gestation after glucose was found on a routine urine dipstick. Despite a 2-week trial of lifestyle modifications, there was no improvement. She was then started on metformin for the past 2 weeks, which has also not improved her daily glucose measurements. During examination, her symphysio-fundal height measures 28 cm and foetal heart rate is present. What is the next appropriate step in her management?