Patients with subclinical hypothyroidism before 20 weeks of pregnancy have a higher risk of miscarriage: A systematic review and meta-analysis

• Yibing Zhang ,

  Contributed equally to this work with: Yibing Zhang, Haoyu Wang

  ¶‡ These authors are co-first authors on this work.

  Affiliation The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China

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• Haoyu Wang ,

  Contributed equally to this work with: Yibing Zhang, Haoyu Wang

  ¶‡ These authors are co-first authors on this work.

  Affiliation The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China

  ⨯
• Xifeng Pan,

  Affiliation The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China

  ⨯
• Weiping Teng,

  Affiliation The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China

  ⨯
• Zhongyan Shan

  * E-mail: shanzhongyan@medmail.com.cn

  Affiliation The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China

  http://orcid.org/0000-0002-2849-2380

  ⨯