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Thyroid autoimmunity and pre-term delivery: Brief review and meta-analysis

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Abstract

Background: About 10% of women in childbearing age are positive for thyroid antibodies. The presence of such antibodies has been associated with adverse obstetrical outcomes, in particular miscarriage and pre-term delivery, even though the strength of these associations varies widely from one study to another. Aim: To evaluate from the available data of the literature, the association between thyroid autoimmunity and pre-term delivery. Material and methods: MEDLINE, EMBASE, Cochrane Library search from 1990 to 2010. A combination of key words was used to generate 2 subset of citations, one indexing thyroid antibodies and the other indexing pre-term delivery as adverse outcome. Results: Seven studies, collecting about 23,000 patients were selected. Meta-analysis of the studies showed an association between thyroid autoimmunity and pre-term delivery [odds ratio =1.67 (confidence interval: 1.44–1.94; p<0.001)]. Conclusions: The results of the meta-analysis confirmed the association between thyroid autoimmunity and pre-term delivery. A cause-effect relationship has to be still clarified and interventional studies are required.

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  1. Division of Endocrinology, “V. Fazzi” Hospital, Lecce, Italy

    R. Negro

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  1. R. Negro
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Correspondence to R. Negro.

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Negro, R. Thyroid autoimmunity and pre-term delivery: Brief review and meta-analysis. J Endocrinol Invest 34, 155–158 (2011). https://doi.org/10.1007/BF03347047

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