Q. A 32-year-old female patient with a history of hyperthyroidism presents to the clinic for routine follow-up. The patient is currently taking Methimazole to manage her hyperthyroidism. The patient informs her physician that she is 6 weeks pregnant. The patient's medical history is significant for Graves' disease and hypertension. Further examination reveals that the patient's thyroid levels are well-controlled with Methimazole, and her blood pressure is within normal limits. The patient's obstetric history is significant for one previous pregnancy, which was uncomplicated. What is the effect of methimazole on the fetus in pregnant women with hyperthyroidism?