Aim: To compare the effect of hormone-compensated autoimmune thyroiditis and other thyroid diseases in patients with in vitro fertilization programs (IVF) younger than 40 years of age on the state of ovarian reserve, oogenesis, early embryogenesis and reproductive outcomes based on an analysis of the occurrence of pregnancy and the level of reproductive losses in I trimester of pregnancy. Materials and methods. We analyzed the condition of ovarial reserve, frequency of cancellation of the embryo transfer due to the disorders of induced oogenesis and early embryogenesis, pregnancy ratio per embryo transfer and the level of early reproductive loss in infertile women with autoimmune thyroiditis (n=63) and other thyroid diseases (n=244) who were included in IVF programs. Results. Among patients with infertility younger than 40 years old with any thyroid disease other than autoimmune thyroiditis, the treatment results were comparable to the observed reproductive outcomes when using IVF in the general population of women of the same age. In the group of patients with autoimmune thyroiditis compared with patients with another thyroid disorders, a significant increase in the proportion of patients with a significant reduction in ovarian reserve (p=0.015), an increase in the frequency of cancellation of embryo transfer due to defective oogenesis and embryogenesis (p=0.049), a decrease of the pregnancy ratio per embryo transfer (p=0.002) and an increase in the incidence of early reproductive losses (p=0.047) were registered. Among women older than 40 years, the differences between the determined parameters in the groups and the presence and absence of autoimmune thyroiditis were not statistically significant, but they were all significantly worse than in younger patients with similar thyroid diseases. Conclusion. Hormonal compensation of hypothyroidism in patients with autoimmune thyroiditis does not provide fertility recovery comparable to that with IVF in individuals with other hormone-compensated thyroid diseases. Age over 40 years increases the negative impact of autoimmune thyroiditis on reproductive potential, further reducing the likelihood of successful artificial conception and virtually depriving the possibility of bearing an induced pregnancy.