Abstract
To investigate the association of thyroid autoimmunity (TAI) with pregnancy outcomes in euthyroid women undergoing in vitro fertilization (IVF). The meta-analysis was a systematic review of cohort studies published before May 10th, 2014. Data were retrieved from Medline, Embase and Cochrane library, and the keywords were "thyroid autoimmunity" and "pregnancy outcome", with restriction to artificial reproductive technique. RevMan 5.2 software was used for data analysis. In all, 11 cohort studies met the inclusion criteria and were included in the meta-analysis. The results showed that TAI was not associated with clinical pregnancy rate (RR=0.99, 95%CI: 0.89-1.11, P=0.92), but significantly associated with miscarriage risk (RR=1.54, 95%CI: 1.24-1.92, P<0.001). Live birth/ongoing pregnancy rate decreased in the TAI group compared with the control group, but there was no statistically significant difference (RR=0.89, 95%CI: 0.79-1.00, P=0.06). As for euthyroid women who are receiving IVF, TAI contributes to increased risk of miscarriage. Therefore, we recommend universal screening for thyroid disease among women undergoing IVF.
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