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Introduction Hypothyroidism diagnosed during pregnancy, whether subclinial or overt, is associated with adverse pregnancy and neonatal outcomes ( 1 ). Existing guidelines unanimously recommend the treatment of overt hypothyroidism (OH) in this
Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam, The Netherlands
Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
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Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
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Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
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Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
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Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam, The Netherlands
Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
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pregnancy, since the fetus does not produce thyroid hormone itself until 16–20 weeks ( 7 ). Untreated maternal hyperthyroidism can not only have fetal consequences such as intra-uterine growth restriction but also life-threatening maternal consequences as
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Introduction The guidelines on the management of thyroid disorders in pregnancy (ATA-GL), mention the following: ‘it is important to note that subclinical hyperthyroidism (SH) has not been associated with adverse pregnancy outcomes. Therefore
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), nutritional factors (iodine and iron), high estradiol levels (ovarian stimulation), high hCG levels (twin pregnancies, during gestational weeks 9–13) and, finally, the variability in the TSH assays ( 1 , 2 , 3 , 4 , 5 , 6 ). In a number of studies, the
Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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Department of Geriatrics, Aalborg University Hospital, Aalborg, Denmark
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Department of Endocrinology, Aalborg University Hospital, Aalborg, Denmark
Steno Diabetes Center North Jutland, Aalborg University Hospital, Aalborg, Denmark
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Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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Introduction The diagnosis and treatment of thyroid disease during pregnancy are debated and uncertainties exist regarding the assessment of maternal thyroid function in early pregnancy ( 1 , 2 ). During a normal pregnancy, several
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Introduction While the prevalence of thyroid nodules during pregnancy in areas with mild to moderate iodine deficiency varies between 3 and 21% ( 1 , 2 ) and increases with increasing parity ( 3 ), data from areas with sufficient iodine
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Introduction Thyroid autoimmunity (TAI) and (subclinical) hypothyroidism (SCH) have been associated with adverse pregnancy outcomes, such as miscarriage, preterm birth, and gestational diabetes mellitus (GDM) ( 1 ). TAI and GDM have been
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Introduction In recent decades, a new concept has been defined with regard to thyroid hormone (TH) function during early pregnancy: isolated hypothyroxinaemia (IH) ( 1 , 2 ). This refers to the condition of women with low free thyroxin (FT4
ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
Hospital de Braga, Braga, Portugal
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ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
ACMP5 – Associação Centro de Medicina P5 (P5), School of Medicine, University of Minho, Braga, Portugal
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Department of Internal Medicine, Erasmus MC, Rotterdam, the Netherlands
The Generation R Study Group, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
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ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
Clinical Academic Center-Braga (2CA-B), Braga, Portugal
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Introduction Iodine is an essential nutrient required for the biosynthesis of thyroid hormone. Thyroid hormone regulates growth and metabolism and is essential for proper fetal brain- and nervous system development ( 1 ). During pregnancy
Institute for Health Science Research Germans Trias i Pujol (IGTP), Badalona, Spain
Department of Medicine, Autonomous University of Barcelona, Badalona, Spain
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Department of Obstetrics & Gynecology, Germans Trias i Pujol University Hospital, Badalona, Spain
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Health Department, Centre d’Estudis Epidemiològics sobre les Infeccions de Transmissió Sexual i Sida de Catalunya (CEEISCAT), Generalitat de Catalunya, Badalona, Spain
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Institute for Health Science Research Germans Trias i Pujol (IGTP), Badalona, Spain
Department of Medicine, Autonomous University of Barcelona, Badalona, Spain
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outcomes, such as an increased risk of miscarriages, prematurity, preeclampsia, or alterations in fetal neurodevelopment ( 2 , 3 , 4 ). On the other hand, during pregnancy, physiological changes occur in the thyroid gland that modulate the maternal