Abstract
Treatment of hypothyroidism is based on substitution of levothyroxine. However, the treatment strategy is different in pregnant women and common population.
The aim of treatment is serum TSH <2.5 mIU/l in the 1st and <3.0 mIU/l in 2nd and 3st trimester of pregnancy. Hyperthyroidism should be treated with propylthiouracil in the 1st and with methimazol in the 2nd a 3st trimester.