This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common cause of hypothyroidism in pregnancy is ? \nSelect and explain. \nA. Nutritional, B. Irradiation, C. Anti thyroid drugs ie iatrogenic, D. Anti TPO antibody', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Anti TPO antibodyHypothyroidism in pregnancyThe clinical association of hypothyroidism in pregnancy may be due to :First time diagnosis in pregnancyHypothyroid women who either discontinue thyroid therapy or who need larger doses in pregnancyHypehyroid women on excessive amounts of antithyroid drugsWomen with lithium or amiodarone therapyPrimary hypothyroidism met in pregnancy is mostly related to thyroid autoimmunity (Hashimoto thyroiditis).Serum thyroid peroxidase antibodies (TPO-Ab) or antimicrosomal antibodies are elevated in autoimmune thyroiditis.", 'role': 'assistant'}]