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gestational thyroid dysfunction

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https://www.readbyqxmd.com/read/28359096/early-maternal-thyroid-function-during-gestation-is-associated-with-fetal-growth-particularly-in-male-newborns
#1
Tanja G M Vrijkotte, E Jessica Hrudey, Marcel B Twickler
Background: Intrauterine growth patterns are influenced by maternal thyroid function during gestation and by fetal sex. It is unknown, however, whether the relationships between maternal thyrotropin (TSH) and free thyroxine (fT4) levels in early pregnancy and fetal growth outcomes are modified by fetal sex. Design: Data were obtained from a community-based cohort study of pregnant women living in Amsterdam (Amsterdam Born Children and Their Development study). TSH and fT4 levels were determined during the first prenatal screening at median 13 weeks (interquartile range, 12 to 14)...
March 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28333271/impact-of-thyroid-autoimmunity-in-euthyroid-women-on-live-birth-rate-after-iui
#2
D Unuane, B Velkeniers, B Bravenboer, P Drakopoulos, H Tournaye, J Parra, M De Brucker
STUDY QUESTION: Does thyroid autoimmunity (TAI) predict live birth rate in euthyroid women after one treatment cycle in IUI patients? SUMMARY ANSWER: TAI as such does not influence pregnancy outcome after IUI treatment. WHAT IS KNOWN ALREADY: The role of TAI on pregnancy outcome in the case of IVF/ICSI is largely debated in the literature. This is the first study to address this issue in the case of IUI. STUDY DESIGN, SIZE, DURATION: This was a retrospective cohort study...
April 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28323629/effects-of-levothyroxine-on-pregnancy-outcomes-in-women-with-thyroid-dysfunction-a-meta-analysis-of-randomized-controlled-trials
#3
Jia Li, Jie Shen, Lan Qin
Context • Subclinical hypothyroidism (SCH) in pregnancy can be associated with increased complications in pregnant women and neurocognitive deficits in fetuses. Two recently published meta-analyses investigated the effects of levothyroxine (LT4) supplementation on pregnancy outcomes but did not report adverse complications and neonatal outcomes. Objectives • The study intended to assess the effects of LT4 supplementation in the treatment of pregnant women with thyroid dysfunction. Design • The research team performed a meta-analysis of randomized controlled trials (RCTs) published in PubMed, Embase, Web of Science, Chinese BioMedical Literature Service System, and China National Knowledge Infrastructure databases...
March 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28199771/thyroid-dysfunction-in-children-with-autism-spectrum-disorder-is-associated-with-folate-receptor-alpha-autoimmune-disorder
#4
Richard E Frye, Rebecca Wynne, Shannon Rose, John Slattery, Leanna Delhey, Marie Tippett, Stephen G Kahler, Sirish C Bennuri, Stepan Melnyk, Jeffrey M Sequeira, Edward Quadros
Folate receptor α (FRα) autoantibodies (FRAAs) are prevalent in Autism Spectrum Disorder (ASD). FRAAs disrupt folate transport across the blood-brain barrier by binding to the FRα. Thyroid dysfunction is frequently found in children with ASD. We measured blocking and binding FRAAs and thyroid stimulating hormone (TSH), free T4 (FT4), total T3 (TT3), reverse T3 (rT3), thyroid releasing hormone (TRH) and other metabolites in 87 children with ASD, 84 of whom also underwent behavior and cognition testing and in 42 of whom FRAAs, TSH and FT4 were measured at two time points...
February 15, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28126204/the-relationship-between-iron-level-and-thyroid-function-during-the-first-trimester-of-pregnancy-a-cross-sectional-study-in-wuxi-china
#5
Jinyan Fu, Anqiang Yang, Jun Zhao, Yunlong Zhu, Ying Gu, Yaohui Xu, Daozhen Chen
Our objective was to evaluate the relationship between iron level and thyroid function during the first trimester of pregnancy in Eastern China. This was a hospital-based, cross-sectional observational study. A total of 1764 pregnant women were enrolled during their first trimester of gestation in Wuxi city. Serum ferritin (SF), hemoglobin (Hb), urinary iodine concentrations (UIC), thyroid-stimulating hormone (TSH), free thyroxine (FT4) and free triiodothyronine (FT3) were measured and evaluated in pregnant women...
January 22, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28102101/thyroid-in-pregnancy-from-physiology-to-screening
#6
Drahomira Springer, Jan Jiskra, Zdenka Limanova, Tomas Zima, Eliska Potlukova
Thyroid hormones are crucial for the growth and maturation of many target tissues, especially the brain and skeleton. During critical periods in the first trimester of pregnancy, maternal thyroxine is essential for fetal development as it supplies thyroid hormone-dependent tissues. The ontogeny of mature thyroid function involves organogenesis, and maturation of the hypothalamus, pituitary and the thyroid gland; and it is almost complete by the 12th-14th gestational week. In case of maternal hypothyroidism, substitution with levothyroxine must be started in early pregnancy...
March 2017: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/28049387/stimulation-of-thyroid-function-by-human-chorionic-gonadotropin-during-pregnancy-a-risk-factor-for-thyroid-disease-and-a-mechanism-for-known-risk-factors
#7
Tim I M Korevaar, Yolanda B de Rijke, Layal Chaker, Marco Medici, Vincent W V Jaddoe, Eric A P Steegers, Theo J Visser, Robin P Peeters
BACKGROUND: Thyroid autoimmunity is a major risk factor for gestational thyroid disease, and recently various other risk factors have been identified, including maternal age, body mass index (BMI) and parity. Human chorionic gonadotropin (hCG) is an important determinant of gestational thyroid function, yet it is unknown to what extent differences in hCG concentration affect the risk for thyroid disease. We have recently shown that thyroperoxidase antibody positivity impairs the thyroidal response to hCG stimulation, which may suggest that this is a mechanism through which thyroid autoimmunity acts as a risk factor for thyroid disease...
March 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28017790/the-cb1-receptor-is-required-for-the-establishment-of-the-hyperlocomotor-phenotype-in-developmentally-induced-hypothyroidism-in-mice
#8
Elena Giné, Victor Echeverry-Alzate, Jose Antonio Lopez-Moreno, Fernando Rodriguez de Fonseca, Ana Perez-Castillo, Angel Santos
Alterations in motor functions are well-characterized features observed in humans and experimental animals with thyroid hormone dysfunctions during development. We have previously suggested the implication of the endocannabinoid system in the hyperlocomotor phenotype observed in developmentally induced hypothyroidism in rats. In this work we have further analyzed the implication of endocannabinoids in the effect of hypothyroidism on locomotor activity. To this end, we evaluated the locomotor activity in adult mice lacking the cannabinoid receptor type 1 (CB1R(-/-)) and in their wild type littermates (CB1R(+/+)), whose hypothyroidism was induced in day 12 of gestation and maintained during the experimental period...
December 23, 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27981252/thyroid-hormone-dysfunction-during-pregnancy-a-review
#9
REVIEW
Aynadis Alemu, Betelihem Terefe, Molla Abebe, Belete Biadgo
Thyroid dysfunctions such as hypothyroidism, thyrotoxicosis and thyroid nodules may develop during pregnancy leading to abortion, placental abruptions, preeclampsia, preterm delivery and reduced intellectual function in the offspring. Epidemiological data have shown the significant role of maternal thyroid hormone in fetal neurologic development and maternal health. It has been suggested that the deleterious effects of thyroid dysfunction can also extend beyond pregnancy and delivery to affect neuro-intellectual development in the early life of the child...
November 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/27916508/development-of-gestation-specific-reference-intervals-for-thyroid-hormones-in-normal-pregnant-northeast-chinese-women-what-is-the-rational-division-of-gestation-stages-for-establishing-reference-intervals-for-pregnancy-women
#10
Jianhua Liu, Xiaojun Yu, Meng Xia, Hong Cai, Guixue Cheng, Lina Wu, Qiang Li, Ying Zhang, Mengyuan Sheng, Yong Liu, Xiaosong Qin
BACKGROUND: A laboratory- and region-specific trimester-related reference interval for thyroid hormone assessment of pregnant women was recommended. Whether the division by trimester is suitable requires verification. Here, we tried to establish appropriate reference intervals of thyroid-related hormones and antibodies for normal pregnant women in Northeast China. METHODS: A total of 947 pregnant women who underwent routine prenatal care were grouped via two methods...
December 2, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27906195/congenital-hypothyroidism-with-delayed-thyroid-stimulating-hormone-elevation-in-premature-infants-born-at-less-than-30-weeks-gestation
#11
D C Kaluarachchi, T T Colaizy, L M Pesce, M Tansey, J M Klein
OBJECTIVE: Congenital hypothyroidism (CH) with delayed thyroid-stimulating hormone (TSH) elevation is a common form of thyroid dysfunction among premature infants. Routine newborn screening (NBS) may miss infants with CH with delayed TSH elevation. The objective of the study is to determine the prevalence of CH with delayed TSH elevation in premature infants and to identify associated risk factors. STUDY DESIGN: Retrospective analysis of serum thyroid function screening (TFS) at day of life 30 in premature infants <30 weeks gestation, admitted to University of Iowa Neonatal Intensive Care Unit between 1 July 2012 to 30 June 2015...
March 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/27884404/exposure-to-perfluoroalkyl-substances-and-thyroid-function-in-pregnant-women-and-children-a-systematic-review-of-epidemiologic-studies
#12
REVIEW
Virginia Ballesteros, Olga Costa, Carmen Iñiguez, Tony Fletcher, Ferran Ballester, Maria-Jose Lopez-Espinosa
INTRODUCTION: Thyroid hormones (THs) are especially important for brain maturation and development during the fetal period and childhood. Several epidemiological studies have assessed the possible association between exposure to perfluoroalkyl substances (PFAS) and thyroid outcomes during the early stages of life. We aimed to review this evidence. METHODS: We conducted a systematic review in compliance with the PRISMA Statement (search conducted in PubMed and Embase, as well as in the citations of the selected articles)...
November 21, 2016: Environment International
https://www.readbyqxmd.com/read/27781488/current-challenges-in-the-pharmacological-management-of-thyroid-dysfunction-in-pregnancy
#13
REVIEW
I Khan, O E Okosieme, J H Lazarus
Thyroid dysfunction is common in pregnancy and has adverse fetal and maternal health consequences. A number of challenges in the management of gestational thyroid dysfunction remain unresolved including uncertainties in optimal thresholds for correction of hypothyroidism and strategies for pharmacological management of hyperthyroidism. Areas covered: We addressed key challenges and areas of uncertainty in the management of thyroid dysfunction in pregnancy. Expert commentary: Gestational thyroid hormone reference intervals vary according to population ethnicity, iodine nutrition, and assay method and each population should derive trimester specific reference intervals for use in pregnancy...
January 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/27777632/the-effect-of-maternal-undernutrition-on-the-rat-placental-transcriptome-protein-restriction-up-regulates-cholesterol-transport
#14
Zoe Daniel, Angelina Swali, Richard Emes, Simon C Langley-Evans
BACKGROUND: Fetal exposure to a maternal low protein diet during rat pregnancy is associated with hypertension, renal dysfunction and metabolic disturbance in adult life. These effects are present when dietary manipulations target only the first half of pregnancy. It was hypothesised that early gestation protein restriction would impact upon placental gene expression and that this may give clues to the mechanism which links maternal diet to later consequences. METHODS: Pregnant rats were fed control or a low protein diet from conception to day 13 gestation...
2016: Genes & Nutrition
https://www.readbyqxmd.com/read/27754809/thyroid-autoimmunity-impairs-the-thyroidal-response-to-human-chorionic-gonadotropin-two-population-based-prospective-cohort-studies
#15
Tim I M Korevaar, Eric A P Steegers, Victor J Pop, Maarten A Broeren, Layal Chaker, Yolanda B de Rijke, Vincent W V Jaddoe, Marco Medici, Theo J Visser, Henning Tiemeier, Robin P Peeters
Context: Thyroperoxidase antibody (TPOAb) positivity is the main risk factor for thyroid dysfunction during pregnancy and is consistently associated with premature delivery. However, the underlying mechanism is currently unknown. We hypothesized that TPOAb positivity may interfere with gestational thyroid stimulation induced by the pregnancy hormone human chorionic gonadotropin (hCG). Design, Setting, and Participants: Thyrotropin (TSH), free thyroxine (FT4), TPOAbs, and/or hCG concentrations were measured in early and late pregnancy of 7587 pregnant women from 2 Dutch population-based prospective cohorts (n = 5924, Generation R study; n = 1663, Holistic Approach to Pregnancy and the First Postpartum Year study)...
January 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27677438/first-trimester-thyroid-stimulating-hormone-as-an-independent-risk-factor-for-adverse-pregnancy-outcome
#16
Nissim Arbib, Eran Hadar, Orly Sneh-Arbib, Rony Chen, Arnon Wiznitzer, Rinat Gabbay-Benziv
PURPOSE: Maternal thyroid gland dysfunction may adversely affect pregnancy outcome. We aimed to examine the association between subclinical thyroid dysfunction, both hypothyroidism and hyperthyroidism, to adverse pregnancy outcome. MATERIALS AND METHODS: Retrospective cohort study of all women with an available first trimester thyroid function testing and known pregnancy outcome, categorized to subclinical hypothyroidism, or hyperthyroidism and evaluated for complication during gestation and delivery...
October 17, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27630749/management-of-thyroid-disease-in-pregnancy-room-for-improvement-in-the-first-trimester
#17
Helen Robinson, Philip Robinson, Michael D'Emden, Kassam Mahomed
BACKGROUND: First-trimester care of maternal thyroid dysfunction has previously been shown to be poor. This study evaluates early management of thyroid dysfunction in pregnancy in Australia. METHODS: Patients reviewed by the Obstetric Medicine team for thyroid dysfunction from 1 January 2012 to 30 June 2013 were included. Data were collected on gestation at referral from the patient's general practitioner to the antenatal clinic, information provided in the referral letter, thyroid function tests and thyroid medications...
September 2016: Obstetric Medicine
https://www.readbyqxmd.com/read/27583471/low-thyroid-hormone-in-early-pregnancy-is-associated-with-an-increased-risk-of-gestational-diabetes-mellitus
#18
Shuai Yang, Feng-Tao Shi, Peter C K Leung, He-Feng Huang, Jianxia Fan
CONTEXT: Although thyroid dysfunction in early pregnancy may have adverse effects on pregnancy outcome and offspring, few prospective studies have evaluated these effects. OBJECTIVE: Our aim was to evaluate the correlations between different thyroid hormone levels in early pregnancy and the incidence of gestational diabetes mellitus (GDM). SETTING AND PARTICIPANTS: The study comprised 27,513 mothers who provided early pregnancy serum samples for analyses of thyroid function...
September 1, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27564693/thyroid-dysfunction-in-preterm-neonates-exposed-to-iodine
#19
Fiona L R Williams, Jennifer Watson, Chris Day, Aung Soe, Sateesh K Somisetty, Lesley Jackson, Elena Velten, Anita Boelen
BACKGROUND: Infants <32 weeks' gestation should not be exposed to topical iodine and its avoidance is recommended during pregnancy and breast feeding. Exposure to contrast media and topical iodine is frequently used in many preterm neonates. AIM: To determine whether thyrotropin levels in preterm infants are affected by exposure to intrapartum/neonatal topical iodine and/or the use of iodinated contrast media. DESIGN: Infants <32 weeks' gestation were recruited...
January 1, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/27384268/risk-factors-and-a-clinical-prediction-model-for-low-maternal-thyroid-function-during-early-pregnancy-two-population-based-prospective-cohort-studies
#20
Tim I M Korevaar, Daan Nieboer, Peter H L T Bisschop, Mariette Goddijn, Marco Medici, Layal Chaker, Yolanda B de Rijke, Vincent W V Jaddoe, Theo J Visser, Ewout W Steyerberg, Henning Tiemeier, Tanja G Vrijkotte, Robin P Peeters
BACKGROUND: Low maternal thyroid function during early pregnancy is associated with various adverse outcomes including impaired neurocognitive development of the offspring, premature delivery and abnormal birthweight. AIM: To aid doctors in the risk assessment of thyroid dysfunction during pregnancy, we set out to investigate clinical risk factors and derive a prediction model based on easily obtainable clinical variables. METHODS: In total, 9767 women during early pregnancy (≤18 week) were selected from two population-based prospective cohorts: the Generation R Study (N = 5985) and the ABCD study (N = 3782)...
December 2016: Clinical Endocrinology
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