1. Glinoer, D . The regulation of thyroid function in pregnancy: pathways of endocrine adaptation from physiology to pathology. Endocr Rev 1997; 18(3): 404–433. DOI: 10.1210/edrv.18.3.0300.
Google Scholar | Crossref | Medline2. Lapthorn, AJ, Harris, DC, Littlejohn, A, et al. Crystal structure of human chorionic gonadotropin. Nature 1994; 369(6480): 455–461. DOI: 10.1038/369455a0.
Google Scholar | Crossref | Medline3. Lazarus, J . Thyroid Regulation and Dysfunction in the Pregnant Patient 2000, Copyright © 2000-2021. South Dartmouth MA: MDText.com, Inc., 2016. (Bookshelf ID: NBK279059).
Google Scholar4. Medici, M, Korevaar, TIM, Visser, WE, et al. Thyroid function in pregnancy: what is normal? Clin Chem 2015; 61(5): 704–713. DOI: 10.1373/clinchem.2014.236646.
Google Scholar | Crossref | Medline5. Knight, BA, Shields, BM, Hattersley, AT, et al. Maternal hypothyroxinaemia in pregnancy is associated with obesity and adverse maternal metabolic parameters. Eur J Endocrinol 2016; 174(1): 51–57. DOI: 10.1530/EJE-15-0866.
Google Scholar | Crossref | Medline6. Rovet, JF . The role of thyroid hormones for brain development and cognitive function. Paediatric Thyroidology 2014; 26: 26–43. DOI: 10.1159/000363153.
Google Scholar | Crossref7. Benhadi, N, Wiersinga, WM, Reitsma, JB, et al. Higher maternal TSH levels in pregnancy are associated with increased risk for miscarriage, fetal or neonatal death. Eur J Endocrinol 2009; 160(6): 985–991. DOI: 10.1530/EJE-08-0953.
Google Scholar | Crossref | Medline | ISI8. Ashoor, G, Maiz, N, Rotas, M, et al. Maternal thyroid function at 11 to 13 weeks of gestation and subsequent fetal death. Thyroid 2010; 20(9): 989–993. DOI: 10.1089/thy.2010.0058.
Google Scholar | Crossref | Medline9. Schneuer, FJ, Nassar, N, Tasevski, V, et al. Association and predictive accuracy of high TSH serum levels in first trimester and adverse pregnancy outcomes. J Clin Endocrinol Metab 2012; 97(9): 3115–3122. DOI: 10.1210/jc.2012-1193.
Google Scholar | Crossref | Medline | ISI10. Korevaar, TIM, Medici, M, de Rijke, YB, et al. Ethnic differences in maternal thyroid parameters during pregnancy: the generation R study. J Clin Endocrinol Metab 2013; 98(9): 3678–3686. DOI: 10.1210/jc.2013-2005.
Google Scholar | Crossref | Medline | ISI11. Lin, L, Zhang, XL, Long, Y. Analysis of thyroid peroxidase antibody in early pregnancy. Genet Mol Res 2014; 13(3): 5107–5114. DOI: 10.4238/2014.July.7.3.
Google Scholar | Crossref | Medline12. CLSI . Defning, Establishing, and Verifying Reference Intervals in the Clinical Laboratory. Approved Guideline—Tird Edition.CLSI Document EP28 – A3c. Wayne, PA, USA: CLSI (Clinical Laboratory Standards Institute), 2010.
Google Scholar13. Alexander, EK, Pearce, EN, Brent, GA, et al. 2017 guidelines of the American thyroid association for the diagnosis and management of thyroid disease during pregnancy and the postpartum. Thyroid 2017; 27(3): 315–389. DOI: 10.1089/thy.2016.0457.
Google Scholar | Crossref | Medline14. Lazarus, J, Brown, RS, Daumerie, C, et al. 2014 European thyroid association guidelines for the management of subclinical hypothyroidism in pregnancy and in children. Eur Thyroid J 2014; 3(2): 76–94. DOI: 10.1159/000362597.
Google Scholar | Crossref | Medline15. Abalovich, M, Amino, N, Barbour, LA, et al. Management of thyroid dysfunction during pregnancy and postpartum: an endocrine society clinical practice guideline. J Clin Endocrinol Metab 2007; 92(8 Suppl): S1–S7. DOI: 10.1210/jc.2007-0141.
Google Scholar | Crossref | Medline | ISI16. Gronowski, AM . Evaluation of thyroid function during pregnancy: have we taken a wrong turn?. Clin Chem 2018; 64(3): 439–441. DOI: 10.1373/clinchem.2017.281261.
Google Scholar | Crossref | Medline17. Sun, R, Xia, J. The reference intervals of thyroid hormones for pregnant women in Zhejiang province. Lab Med 2017; 49(1): 5–10. DOI: 10.1093/labmed/lmx070.
Google Scholar | Crossref | Medline18. Xing, J, Yuan, E, Li, J, et al. Trimester- and assay-specific thyroid reference intervals for pregnant women in China. Int J Endocrinol 2016; 2016: 1–5. DOI: 10.1155/2016/3754213.
Google Scholar | Crossref19. Zhang, X, Yao, B, Li, C, et al. Reference intervals of thyroid function during pregnancy: self-sequential longitudinal study versus cross-sectional study. Thyroid 2016; 26(12): 1786–1793. DOI: 10.1089/thy.2016.0002.
Google Scholar | Crossref | Medline20. Wang, G, Zhang, G. the diverse upper reference limits of serum thyroid-stimulating hormone on the same platform for pregnant women in China. Lab Med 2020; 51(4): 416–422. DOI: 10.1093/labmed/lmz089.
Google Scholar | Crossref | Medline21. Chinese Society of Endocrinology, C.S.o.P.M . Guidelines for the diagnosis and treatment of thyroid diseases during pregnancy and postpartum. Chin J Endocrinol Metab 2019; 35(8): 636–665. DOI: 10.3760/cma.j.issn.1007-9408.2019.08.001.
Google Scholar | Crossref22. Siemens Diagnosis Reagent Packet Insert Ref, V 19 English, 2010-05.
Google Scholar23. Zhou, Q, Zhang, Y, Zhou, J, et al. Analysis of detection results of thyroid function-related indexes in pregnant women and establishment of the reference interval. Exp Therapeutic Medicine 2019; 17(3): 1749–1755.
Google Scholar | Medline24. Nazarpour, S, Ramezani Tehrani, F, Simbar, M, et al. Establishment of trimester-specific reference range for thyroid hormones during pregnancy. Clin Biochem 2018; 53: 49–54. DOI: 10.1016/j.clinbiochem.2018.01.006.
Google Scholar | Crossref | Medline25. Zhang, J, Li, W, Chen, QB, et al. Establishment of trimester-specific thyroid stimulating hormone and free thyroxine reference interval in pregnant Chinese women using the Beckman Coulter UniCel™ DxI 600. Clin Chemistry Laboratory Medicine 2015; 53(9): 1409–1414.
Google Scholar | Crossref | Medline26. Akarsu, S, Akbiyik, F, Karaismailoglu, E, et al. Gestation specific reference intervals for thyroid function tests in pregnancy. Clin Chem Lab Med (Cclm) 2016; 54(8): 1377–1383. DOI: 10.1515/cclm-2015-0569.
Google Scholar | Crossref | Medline27. Kim, HJ, Cho, YY, Kim, SW, et al. Reference intervals of thyroid hormones during pregnancy in Korea, an iodine-replete area. Korean J Intern Med 2018; 33(3): 552–560. DOI: 10.3904/kjim.2016.051.
Google Scholar | Crossref | Medline28. Kostecka-Matyja, M, Fedorowicz, A, Bar-Andziak, E, et al. Reference values for TSH and free thyroid hormones in healthy pregnant women in Poland: a prospective, multicenter study. Eur Thyroid J 2017; 6(2): 82–88. DOI: 10.1159/000453061.
Google Scholar | Crossref | Medline29. Han, L, Zheng, W, Zhai, Y, et al. Reference intervals of trimester-specific thyroid stimulating hormone and free thyroxine in Chinese women established by experimental and statistical methods. J Clin Lab Anal 2018; 32(4): e22344. DOI: 10.1002/jcla.22344.
Google Scholar | Crossref | Medline30. Bulur, O, Atak, Z, Ertugrul, DT, et al. Trimester-specific reference intervals of thyroid function tests in Turkish pregnants. Gynecol Endocrinol 2020; 36(5): 413–416.
Google Scholar | Crossref | Medline31. Milinković, N, Ignjatović, S, Žarković, M, et al. Indirect estimation of reference intervals for thyroid parameters. Clin Lab 2014; 60(7): 1083–1089. DOI: 10.7754/clin.lab.2013.130733.
Google Scholar | Crossref | Medline32. Farrell, CL, Nguyen, L. Indirect reference intervals: harnessing the power of stored laboratory data. Clin Biochemist Rev 2019; 40(2): 99–111. DOI: 10.33176/AACB-19-00022.
Google Scholar | Crossref | Medline33. Bakan, E, Polat, H, Ozarda, Y, et al. A reference interval study for common biochemical analytes in Eastern Turkey: a comparison of a reference population with laboratory data mining. Biochemia Med 2016; 26(2): 210–223. DOI: 10.11613/BM.2016.023.
Google Scholar | Crossref34. Duan, Y, Peng, L, Cui, Y, et al. Reference intervals for thyroid function and the negative correlation between FT4 and HbA1c in pregnant women of West China. Clin Lab 2015; 61(7): 777–783. DOI: 10.7754/clin.lab.2015.141235.
Google Scholar | Crossref | Medline35. Wang, D, Li, D, Guo, X, et al. Effects of sex, age, sampling time, and season on thyroid-stimulating hormone concentrations: a retrospective study. Biochem Biophysical Res Commun 2018; 506(3): 450–454. DOI: 10.1016/j.bbrc.2018.10.099.
Google Scholar | Crossref | Medline36. Gao, X, Li, Y, Li, J, et al. Gestational TSH and FT4 reference intervals in Chinese women: a systematic review and meta-analysis. Front Endocrinol 2018; 9: 432. DOI: 10.3389/fendo.2018.00432.
Google Scholar | Crossref | Medline37. Lepoutre, T, Debiève, F, Gruson, D, et al. Reduction of miscarriages through universal screening and treatment of thyroid autoimmune diseases. Gynecol Obstet Invest 2012; 74(4): 265–273. DOI: 10.1159/000343759.
Google Scholar | Crossref | Medline | ISI38. Kianpour, M, Aminorroaya, A, Amini, M, et al. Reference intervals for thyroid hormones during the first trimester of gestation: a report from an area with a sufficient iodine level. Horm Metab Res 2019; 51(3): 165–171. DOI: 10.1055/a-0855-7128.
Google Scholar | Crossref | Medline39. Haddow, JE, McClain, MR, Lambert-Messerlian, G, et al. Variability in thyroid-stimulating hormone suppression by human chronic gonadotropin during early pregnancy. J Clin Endocrinol Metab 2008; 93(9): 3341–3347. DOI: 10.1210/jc.2008-0568.
Google Scholar | Crossref | Medline40. Poole, JA, Claman, HN. Immunology of pregnancy: implications for the mother. Clin Rev Allergy Immunol 2004; 26(3): 161–170. DOI: 10.1385/CRIAI:26:3:161.
Google Scholar | Crossref | Medline41. Ollero, MD, Toni, M, Pineda, JJ, et al. Thyroid function reference values in healthy iodine-sufficient pregnant women and influence of thyroid nodules on thyrotropin and free thyroxine values. Thyroid 2019; 29(3): 421–429. DOI: 10.1089/thy.2018.0324.
Google Scholar | Crossref | Medline