Endocrinol Metab.  2016 Sep;31(3):386-391. 10.3803/EnM.2016.31.3.386.

Update on the Management of Thyroid Disease during Pregnancy

Affiliations
  • 1Department of Internal Medicine, Cheil General Hospital & Women's Healthcare Center, Dankook University College of Medicine, Seoul, Korea. changhoon.yim@cgh.co.kr

Abstract

Thyroid dysfunction during pregnancy can result in serious complications for both the mother and infant; however, these complications can be prevented by optimal treatment of maternal overt thyroid dysfunction. Although several studies have demonstrated that maternal subclinical hypothyroidism is associated with obstetric complications and neurocognitive impairments in offspring, there is limited evidence that levothyroxine treatment can improve these complications. Therefore, most professional societies do not recommend universal screening for thyroid dysfunction during pregnancy, and instead recommend a case-finding approach in which only high-risk women are tested. However, recent studies have estimated that targeted thyroid function testing misses approximately 30% to 55% of hypothyroidism cases in pregnant women, and some associations and researchers have recommended universal screening of pregnant women to facilitate the early detection and treatment of overt hypothyroidism. This review summarizes recent data on thyroid function test changes, thyroid functional disorder management, and thyroid screening during pregnancy.

Keyword

Pregnancy; Thyroid diseases; Hyperthyroidism; Hypothyroidism

MeSH Terms

Female
Humans
Hyperthyroidism
Hypothyroidism
Infant
Mass Screening
Mothers
Pregnancy*
Pregnant Women
Thyroid Diseases*
Thyroid Function Tests
Thyroid Gland*
Thyroxine
Thyroxine

Reference

1. Glinoer D. Thyroid hyperfunction during pregnancy. Thyroid. 1998; 8:859–864.
2. Klein RZ, Haddow JE, Faix JD, Brown RS, Hermos RJ, Pulkkinen A, et al. Prevalence of thyroid deficiency in pregnant women. Clin Endocrinol (Oxf). 1991; 35:41–46.
3. Stagnaro-Green A, Abalovich M, Alexander E, Azizi F, Mestman J, Negro R, et al. Guidelines of the American Thyroid Association for the diagnosis and management of thyroid disease during pregnancy and postpartum. Thyroid. 2011; 21:1081–1125.
4. De Groot L, Abalovich M, Alexander EK, Amino N, Barbour L, Cobin RH, et al. Management of thyroid dysfunction during pregnancy and postpartum: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2012; 97:2543–2565.
5. Lazarus J, Brown RS, Daumerie C, Hubalewska-Dydejczyk A, Negro R, Vaidya B. 2014 European Thyroid Association guidelines for the management of subclinical hypothyroidism in pregnancy and in children. Eur Thyroid J. 2014; 3:76–94.
6. Werner SC, Ingbar SH, Braverman LE, Utiger RD. Werner & Ingbar's the thyroid. 9th ed. Philadelphia: Lippincott Williams & Wilkins;2005. p. 1086.
7. Glinoer D, de Nayer P, Bourdoux P, Lemone M, Robyn C, van Steirteghem A, et al. Regulation of maternal thyroid during pregnancy. J Clin Endocrinol Metab. 1990; 71:276–287.
8. Baloch Z, Carayon P, Conte-Devolx B, Demers LM, Feldt-Rasmussen U, Henry JF, et al. Laboratory medicine practice guidelines. Laboratory support for the diagnosis and monitoring of thyroid disease. Thyroid. 2003; 13:3–126.
9. Ballabio M, Poshychinda M, Ekins RP. Pregnancy-induced changes in thyroid function: role of human chorionic gonadotropin as putative regulator of maternal thyroid. J Clin Endocrinol Metab. 1991; 73:824–831.
10. Soldin OP, Tractenberg RE, Hollowell JG, Jonklaas J, Janicic N, Soldin SJ. Trimester-specific changes in maternal thyroid hormone, thyrotropin, and thyroglobulin concentrations during gestation: trends and associations across trimesters in iodine sufficiency. Thyroid. 2004; 14:1084–1090.
11. Glinoer D. The regulation of thyroid function in pregnancy: pathways of endocrine adaptation from physiology to pathology. Endocr Rev. 1997; 18:404–433.
12. Glinoer D, Spencer CA. Serum TSH determinations in pregnancy: how, when and why? Nat Rev Endocrinol. 2010; 6:526–529.
13. Li C, Shan Z, Mao J, Wang W, Xie X, Zhou W, et al. Assessment of thyroid function during first-trimester pregnancy: what is the rational upper limit of serum TSH during the first trimester in Chinese pregnant women? J Clin Endocrinol Metab. 2014; 99:73–79.
14. Brabant G, Peeters RP, Chan SY, Bernal J, Bouchard P, Salvatore D, et al. Management of subclinical hypothyroidism in pregnancy: are we too simplistic? Eur J Endocrinol. 2015; 173:P1–P11.
15. McNeil AR, Stanford PE. Reporting thyroid function tests in pregnancy. Clin Biochem Rev. 2015; 36:109–126.
16. Medici M, Korevaar TI, Visser WE, Visser TJ, Peeters RP. Thyroid function in pregnancy: what is normal? Clin Chem. 2015; 61:704–713.
17. Stagnaro-Green A. Overt hyperthyroidism and hypothyroidism during pregnancy. Clin Obstet Gynecol. 2011; 54:478–487.
18. Casey BM, Leveno KJ. Thyroid disease in pregnancy. Obstet Gynecol. 2006; 108:1283–1292.
19. Haddow JE, Palomaki GE, Allan WC, Williams JR, Knight GJ, Gagnon J, et al. Maternal thyroid deficiency during pregnancy and subsequent neuropsychological development of the child. N Engl J Med. 1999; 341:549–555.
20. Casey BM, Dashe JS, Wells CE, McIntire DD, Byrd W, Leveno KJ, et al. Subclinical hypothyroidism and pregnancy outcomes. Obstet Gynecol. 2005; 105:239–245.
21. Blatt AJ, Nakamoto JM, Kaufman HW. National status of testing for hypothyroidism during pregnancy and postpartum. J Clin Endocrinol Metab. 2012; 97:777–784.
22. Stagnaro-Green A. Postpartum management of women begun on levothyroxine during pregnancy. Front Endocrinol (Lausanne). 2015; 6:183.
23. Maraka S, Ospina NM, O'Keeffe DT, Espinosa De Ycaza AE, Gionfriddo MR, Erwin PJ, et al. Subclinical hypothyroidism in pregnancy: a systematic review and meta-analysis. Thyroid. 2016; 26:580–590.
24. Cleary-Goldman J, Malone FD, Lambert-Messerlian G, Sullivan L, Canick J, Porter TF, et al. Maternal thyroid hypofunction and pregnancy outcome. Obstet Gynecol. 2008; 112:85–92.
25. Mannisto T, Vaarasmaki M, Pouta A, Hartikainen AL, Ruokonen A, Surcel HM, et al. Thyroid dysfunction and autoantibodies during pregnancy as predictive factors of pregnancy complications and maternal morbidity in later life. J Clin Endocrinol Metab. 2010; 95:1084–1094.
26. Li Y, Shan Z, Teng W, Yu X, Li Y, Fan C, et al. Abnormalities of maternal thyroid function during pregnancy affect neuropsychological development of their children at 25-30 months. Clin Endocrinol (Oxf). 2010; 72:825–829.
27. Su PY, Huang K, Hao JH, Xu YQ, Yan SQ, Li T, et al. Maternal thyroid function in the first twenty weeks of pregnancy and subsequent fetal and infant development: a prospective population-based cohort study in China. J Clin Endocrinol Metab. 2011; 96:3234–3241.
28. Javed Z, Sathyapalan T. Levothyroxine treatment of mild subclinical hypothyroidism: a review of potential risks and benefits. Ther Adv Endocrinol Metab. 2016; 7:12–23.
29. Henrichs J, Bongers-Schokking JJ, Schenk JJ, Ghassabian A, Schmidt HG, Visser TJ, et al. Maternal thyroid function during early pregnancy and cognitive functioning in early childhood: the generation R study. J Clin Endocrinol Metab. 2010; 95:4227–4234.
30. Behrooz HG, Tohidi M, Mehrabi Y, Behrooz EG, Tehranidoost M, Azizi F. Subclinical hypothyroidism in pregnancy: intellectual development of offspring. Thyroid. 2011; 21:1143–1147.
31. Negro R, Schwartz A, Gismondi R, Tinelli A, Mangieri T, Stagnaro-Green A. Universal screening versus case finding for detection and treatment of thyroid hormonal dysfunction during pregnancy. J Clin Endocrinol Metab. 2010; 95:1699–1707.
32. Taylor PN, Thayer D, Lacey A, Boelaert K, Ludgate ME, Rees A, et al. Controlled antenatal thyroid screening study: obstetric outcome. Thyroid. 2015; 25:Suppl 1. A358.
33. Lazarus JH, Bestwick JP, Channon S, Paradice R, Maina A, Rees R, et al. Antenatal thyroid screening and childhood cognitive function. N Engl J Med. 2012; 366:493–501.
34. Casey B. Effect of treatment of maternal subclinical hypothyroidism or hypothyroxinemia on IQ in offspring. Am J Obstet Gynecol. 2016; 214:1 Suppl. S2.
35. Mandel SJ, Larsen PR, Seely EW, Brent GA. Increased need for thyroxine during pregnancy in women with primary hypothyroidism. N Engl J Med. 1990; 323:91–96.
36. Alexander EK, Marqusee E, Lawrence J, Jarolim P, Fischer GA, Larsen PR. Timing and magnitude of increases in levothyroxine requirements during pregnancy in women with hypothyroidism. N Engl J Med. 2004; 351:241–249.
37. Patil-Sisodia K, Mestman JH. Graves hyperthyroidism and pregnancy: a clinical update. Endocr Pract. 2010; 16:118–129.
38. Glinoer D, De Nayer P, Robyn C, Lejeune B, Kinthaert J, Meuris S. Serum levels of intact human chorionic gonadotropin (HCG) and its free alpha and beta subunits, in relation to maternal thyroid stimulation during normal pregnancy. J Endocrinol Invest. 1993; 16:881–888.
39. Goodwin TM, Montoro M, Mestman JH. Transient hyperthyroidism and hyperemesis gravidarum: clinical aspects. Am J Obstet Gynecol. 1992; 167:648–652.
40. Tan JY, Loh KC, Yeo GS, Chee YC. Transient hyperthyroidism of hyperemesis gravidarum. BJOG. 2002; 109:683–688.
41. Casey BM, Dashe JS, Wells CE, McIntire DD, Leveno KJ, Cunningham FG. Subclinical hyperthyroidism and pregnancy outcomes. Obstet Gynecol. 2006; 107(2 Pt 1):337–341.
42. Davis LE, Lucas MJ, Hankins GD, Roark ML, Cunningham FG. Thyrotoxicosis complicating pregnancy. Am J Obstet Gynecol. 1989; 160:63–70.
43. Aggarawal N, Suri V, Singla R, Chopra S, Sikka P, Shah VN, et al. Pregnancy outcome in hyperthyroidism: a case control study. Gynecol Obstet Invest. 2014; 77:94–99.
44. Andersen SL, Olsen J, Laurberg P. Antithyroid drug side effects in the population and in pregnancy. J Clin Endocrinol Metab. 2016; 101:1606–1614.
45. Andersen SL, Olsen J, Wu CS, Laurberg P. Birth defects after early pregnancy use of antithyroid drugs: a Danish nationwide study. J Clin Endocrinol Metab. 2013; 98:4373–4381.
46. Yoshihara A, Noh J, Yamaguchi T, Ohye H, Sato S, Sekiya K, et al. Treatment of graves' disease with antithyroid drugs in the first trimester of pregnancy and the prevalence of congenital malformation. J Clin Endocrinol Metab. 2012; 97:2396–2403.
47. Bahn RS, Burch HS, Cooper DS, Garber JR, Greenlee CM, Klein IL, et al. The role of propylthiouracil in the management of Graves' disease in adults: report of a meeting jointly sponsored by the American Thyroid Association and the Food and Drug Administration. Thyroid. 2009; 19:673–674.
48. American College of Obstetricians and Gynecologists. Practice bulletin no. 148: thyroid disease in pregnancy. Obstet Gynecol. 2015; 125:996–1005.
49. Hamburger JI. Diagnosis and management of Graves' disease in pregnancy. Thyroid. 1992; 2:219–224.
50. Rubin PC. Current concepts: beta-blockers in pregnancy. N Engl J Med. 1981; 305:1323–1326.
51. Polak M, Le Gac I, Vuillard E, Guibourdenche J, Leger J, Toubert ME, et al. Fetal and neonatal thyroid function in relation to maternal Graves' disease. Best Pract Res Clin Endocrinol Metab. 2004; 18:289–302.
52. McKenzie JM, Zakarija M. Fetal and neonatal hyperthyroidism and hypothyroidism due to maternal TSH receptor antibodies. Thyroid. 1992; 2:155–159.
53. Matthews DC, Syed AA. The role of TSH receptor antibodies in the management of Graves' disease. Eur J Intern Med. 2011; 22:213–216.
54. Hales C, Channon S, Taylor PN, Draman MS, Muller I, Lazarus J, et al. The second wave of the Controlled Antenatal Thyroid Screening (CATS II) study: the cognitive assessment protocol. BMC Endocr Disord. 2014; 14:95.
55. Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD). Thyroid therapy for mild thyroid deficiency in pregnancy (TSH) [Internet]. Bethesda: National Library of Medicine;2000. cited 2016 Jul 26. Available from: http://www.clinicaltrials.gov/ct/show/NCT00388297.
56. Vaidya B, Anthony S, Bilous M, Shields B, Drury J, Hutchison S, et al. Detection of thyroid dysfunction in early pregnancy: universal screening or targeted high-risk case finding? J Clin Endocrinol Metab. 2007; 92:203–207.
57. Horacek J, Spitalnikova S, Dlabalova B, Malirova E, Vizda J, Svilias I, et al. Universal screening detects two-times more thyroid disorders in early pregnancy than targeted high-risk case finding. Eur J Endocrinol. 2010; 163:645–650.
58. Laurberg P, Andersen SL, Pedersen IB, Andersen S, Carle A. Screening for overt thyroid disease in early pregnancy may be preferable to searching for small aberrations in thyroid function tests. Clin Endocrinol (Oxf). 2013; 79:297–304.
59. Stagnaro-Green A. Screening pregnant women for overt thyroid disease. JAMA. 2015; 313:565–566.
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