Most common cause of hypothyroidism in pregnancy is ?

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.