Pregnancy has a profound impact on the thyroid gland and thyroid function since the thyroid may encounter changes to hormones and size during pregnancy. Mild hyperthyroidism often is monitored closely without therapy as long as both the mother and the baby are doing well. The treatment of hypothyroidism in a pregnant woman is the same as for a man or non-pregnant woman, namely, adequate replacement of thyroid hormone in the form of synthetic levothyroxine. The treatment goal of hypothyroidism in pregnancy is to maintain a thyroid hormone level within high normal
