MRCP2-3878
A 28-year-old woman who is 13 weeks pregnant presents at the outpatient clinic with a sustained blood pressure reading of 170/92 mmHg. She has no significant medical history and has been feeling well with no symptoms. On examination, there are no abnormalities except for protein (+) and blood (+) in her urine. Fundoscopy shows no abnormalities, and an ultrasound of her kidneys reveals both to be of equal size at 9-10 cm. What is the probable cause of her hypertension?