Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.
During pregnancy in hypothyroid patients, serum free T4 levels may decrease and serum TSH levels increase to values outside the normal range.Elevations in serum TSH may occur at 4 weeks' gestation;n monitor TSH levels during each trimester (or every 6 weeks) and adjust thyroid dosage accordingly. Reduce dosage to pre-pregnancy level immediately after delivery, since postpartum TSH concentrations are similar to preconception levels;n measure serum TSH concentrations 6-8 weeks postpartum.m
Although thyroid hormones are minimally distributed into human milk, exercise caution when administering to a nursing woman.However, adequate replacement dosages generally are needed to maintain normal lactation