[Frequency of miscarriages among pregnant women with autoimmune thyroid disorders].

ABSTRACT

AIM OF THE STUDY To analyse the influence of antithyroid antibodies (ATA) on the frequency of spontaneous abortions (SA) by pregnant women with a normal thyroid gland function. DESIGN OF THE STUDY Prospective clinical study on 42 selected pregnant women with a normal thyroid gland function divided into two groups I-st group--ATA positive pregnant [n = 28] and II-end group ATA negative pregnant [n = 14]. RESULTS: Increased ATA have been found by 30 (71.4%) out of the studied 42 pregnant women. There has been no significant difference found among the values of FT3, FT4 and TSH for women with positive and negative ATA. SA have been observed at 63.3% (19/30 women) from the ATA positive ones and at 25% (4/12 women) from the ATA negative ones (P = 0.001). By the ATA positive women with SA the average values of antithyroglobulin autoantibody (Tg-Ab) (Tg-Ab positive.-189.6 +/- 49.8 IU/ml vs. Tg-Ab -negative 118.2 +/- 58.3 IU/ml, P = 0.02) and antithyroid peroxidase autoantibody (TPO-Ab) (TPO-Ab positive-176.9 +/- 57.4 IU/ml vs. TPO - negative 118.2 +/- 81.3 IU/ml, P = 0.004) are both found to be significantly higher. CONCLUSION: There is a correlation found between ATA and the increased risk of SA, where the increased concentration of ATA is combined with an increased frequency of SA.