Antithyroid Antibodies in Sera of Women with Spontaneous Abortion and Normal Pregnancies

Abstract

Autoimmune thyroiditis is the most frequent autoimmune disease. We analyzed the association between the presence and value of titer of anti-thyroid antibodies (atbs) and spontaneous abortion (SA). Moreover, we analyzed the association between TSH values and the presence of anti-thyroids atbs. We tested anti-TPO and anti-TG atbs in 257 women: 85 probands, 87 pregnant women with normal pregnancy outcome, and 85 with SA. We tested TSH in 87 pregnant women with normal pregnancy outcome. No significant difference was found between the prevalence of cases with positive anti-TPO and anti-TG atbs in women with normal pregnancy outcome vs. SA patients. In women with positive atbs titer, anti-TPO and anti-TG values were higher in SA group compared with normal pregnancy outcome group. A significant threshold was reached only for anti-TG atbs. TSH values were higher in pregnant women with positive anti-TPO and anti-TG values compared with those with a negative atbs titer. In pregnant women with positive anti-thyroid atbs titers, spontaneous abortion group patients have higher anti-TG titers than women with normal pregnancy outcome. TSH values are higher in the group of patients with positive anti-TPO and anti-TG atbs titers compared with the group of patients with negative anti-TPO and anti-TG values. Keywords: Anti-TPO, anti-TG, pregnancy outcome, spontaneous abortion, TSH