Hypothyroidism is one of the most common endocrine diseases. More than 99% of all cases of hypothyroidism in adults are due to primary hypothyroidism. Most often, hypothyroidism develops because of chronic autoimmune thyroiditis, as well as after medical manipulations (iatrogenic hypothyroidism) — postoperative or as a result of therapy with radioactive iodine. The article presents a draft of clinical guidelines for the diagnosis and treatment of hypothyroidism in different groups of patients, including pregnant women.

On February 12, 2021, endocrinologists of our country celebrate the anniversary of Ivan Ivanovich Dedov, Honored Scientist of the Russian Federation, member of the Presidium of the Russian Academy of Sciences, President of the Endocrinology Research Centre, President of the Russian Association of Endocrinologists, chief freelance expert-endocrinologist of the Ministry of Health of Russia Ivan Ivanovich Dedov — a famous scientist who plays a key role in the organization and ideology of the country’s endocrinological service. The editorial board and editorial board of the journal «Clinical and Experimental Thyroidology» join the numerous congratulations addressed to Academician I.I. Dedov, wishing to continue to constantly implement his inspiring ideas and plans.