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Thyroid and pregnancy

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https://www.readbyqxmd.com/read/29234808/effect-of-levothyroxine-on-miscarriage-among-women-with-normal-thyroid-function-and-thyroid-autoimmunity-undergoing-in-vitro-fertilization-and-embryo-transfer-a-randomized-clinical-trial
#1
Haining Wang, Hongwei Gao, Hongbin Chi, Lin Zeng, Wenhua Xiao, Yanrong Wang, Rong Li, Ping Liu, Chen Wang, Qing Tian, Zehong Zhou, Jin Yang, Ye Liu, Rui Wei, Ben Willem J Mol, Tianpei Hong, Jie Qiao
Importance: Presence of thyroid autoantibodies in women with normal thyroid function is associated with increased risk of miscarriage. Whether levothyroxine treatment improves pregnancy outcomes among women undergoing in vitro fertilization and embryo transfer (IVF-ET) is unknown. Objective: To determine the effect of levothyroxine on miscarriage among women undergoing IVF-ET who had normal thyroid function and tested positive for thyroid autoantibodies. Design, Setting, and Participants: An open-label, randomized clinical trial involving 600 women who tested positive for the antithyroperoxidase antibody and were being treated for infertility at Peking University Third Hospital from September 2012 to March 2017...
December 12, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29230292/multiple-steroid-and-thyroid-hormones-detected-in-baleen-from-eight-whale-species
#2
Kathleen E Hunt, Nadine S Lysiak, Jooke Robbins, Michael J Moore, Rosemary E Seton, Leigh Torres, C Loren Buck
Recent studies have demonstrated that some hormones are present in baleen powder from bowhead (Balaena mysticetus) and North Atlantic right (Eubalaena glacialis) whales. To test the potential generalizability of this technique for studies of stress and reproduction in large whales, we sought to determine whether all major classes of steroid and thyroid hormones are detectable in baleen, and whether these hormones are detectable in other mysticetes. Powdered baleen samples were recovered from single specimens of North Atlantic right, bowhead, blue (Balaenoptera [B...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/29221723/effects-of-thyroxine-on-expression-of-proteins-related-to-thyroid-hormone-functions-tr-%C3%AE-tr-%C3%AE-rxr-and-erk1-2-in-uterus-during-peri-implantation-period
#3
Abu Sadat Md Sayem, Nelli Giribabu, Sekaran Muniandy, Naguib Salleh
INTRODUCTION: Thyroid hormone is known to play important role during embryo implantation, however mechanisms underlying its actions in uterus during peri-implantation period has not been fully identified. In this study, we hypothesized that thyroid hormone could affect expression of proteins related to its function, where these could explain mechanisms for its action in uterus during this period. METHODS: Female rats, once rendered hypothyroid via oral administration of methimazole (0...
December 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29220528/maternal-thyroid-function-in-early-pregnancy-and-neuropsychological-performance-of-the-child-at-5-years-of-age
#4
Stine Linding Andersen, Stig Andersen, Zeyan Liew, Peter Vestergaard, Jørn Olsen
Context: Abnormal maternal thyroid function in pregnancy may impair fetal brain development, but more evidence is needed to refine and corroborate the hypothesis. Objective: To estimate the association between maternal thyroid function in early pregnancy and neuropsychological performance of the child at 5 years of age. Design: Follow-up study. Participants: A cohort of 1,153 women and their children sampled from the Danish National Birth Cohort...
December 6, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29219024/excess-maternal-thyroxine-alters-the-proliferative-activity-and-angiogenic-profile-of-growth-cartilage-of-rats-at-birth-and-weaning
#5
Lorena Gabriela Rocha Ribeiro, Juneo Freitas Silva, Natália de Melo Ocarino, Cíntia Almeida de Souza, Eliane Gonçalves de Melo, Rogéria Serakides
Objective The aim of this study was to unravel the mechanisms by which thyroxine affects skeletal growth by evaluating proliferative activity and angiogenic profile of growth cartilage of neonatal and weanling rats. Methods Sixteen adult Wistar rats were equally divided into 2 groups: control and treated with thyroxine during pregnancy and lactation. The weight, measurement of plasma free T4 and thyroids, femurs' histomorphometric analysis, and proliferative activity and angiogenic profile by immunohistochemical or real-time reverse transcriptase-polymerase chain reaction in growth cartilage was performed...
January 2018: Cartilage
https://www.readbyqxmd.com/read/29201073/knowledge-of-thyroid-disorders-during-pregnancy-among-general-practitioners-in-iran
#6
Sahar Askari, Hengameh Abdi, Soleiman Ahmadi, Zahra Bahadoran, Atieh Amouzegar
Background and Objectives: Thyroid disorders during pregnancy are important health problems worldwide. The aim of this study was to assess the knowledge of general practitioners (GPs) about thyroid disorders during pregnancy. Methods: In this cross sectional study, 120 GPs were randomly selected among participants of a continuous medical education (CME) program, entitled "practical endocrinology". To assess the knowledge and educational requirements of GPs regarding thyroid disorders during pregnancy, a validated and localized multiple-choice questionnaire was used...
July 2017: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29197845/neck-mass-an-obstructive-cause-of-respiratory-distress-with-medical-management
#7
Vijay Singh, Aakash Pandita, Girish Gupta, Amit Shukla
Congenital goitre is a known cause of hypothyroidism in newborn. Congenital goitre can be due to defective synthesis of thyroxine or administration of antithyroid drugs to the mother during pregnancy. In this case report, we report an instance of a preterm male infant with antenatally detected goitre presenting as a neck mass with congenital hypothyroidism. Hormonal replacement therapy was started immediately after birth which lead to resolution of the mass and normalisation of thyroid function.
December 2, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29187947/macroprolactinemia-and-empty-sella-syndrome
#8
Ach Taieb, Kacem Njah Maha, Yosra Hasni El Abed, Amel Maaroufi Beizig, Molka Chaieb Chadli, Koussay Ach
Macroprolactinemia is a polymeric form of prolactin-release, causing mildly symptomatic clinical pictures. The former can be isolated or associated with other causes of hyperprolactinemia. The association with an empty sella syndrome is rare. We report a case of a female patient discovered with this association. It's about a female patient 47 years old, followed up since the age of 31 years for bilateral galactorrhea and a spaniomenorrhea. There has been no associated drug intake. Her exploration has showed a serum prolactin level of 635 mIU/L...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29187511/pregnancy-outcomes-are-not-altered-by-variation-in-thyroid-function-within-the-normal-range-in-women-free-of-thyroid-disease
#9
Flora Veltri, Pierre Kleynen, Lidia Grabczan, Alexandra Salajan, Serge Rozenberg, Thierry Pepersack, Kris Gustave Poppe
OBJECTIVE: In the recently revised guidelines on the management of thyroid dysfunction during pregnancy, treatment with thyroid hormone (LT4) is not recommended in women without thyroid autoimmunity (TAI) and TSH levels in the range 2.5-4.0 mIU/L, and in a recent study in that particular group of pregnant women, more complications were observed when a treatment with LT4 was given. The objective of the study was therefore to investigate whether variation in thyroid function within the normal (non-pregnant) range in women free of thyroid disease was associated with altered pregnancy outcomes? DESIGN: Cross-sectional data analysis of 1321 pregnant women nested within an ongoing prospective collection of pregnant women's data in a single centre in Brussels, Belgium...
November 29, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29175438/gestational-3-3-4-4-5-pentachlorobiphenyl-pcb-126-exposure-disrupts-fetoplacental-unit-fetal-thyroid-cytokines-dysfunction
#10
R G Ahmed
Exposure to polychlorinated biphenyls (PCBs) is related to several endocrine disorders. This study examined the effect of maternal exposure of 3,3',4,4',5-pentachlorobiphenyl (PCB 126) on the fetoplacental unit and fetal thyroid-cytokine axis during the pregnancy. Pregnant albino rats received PCB 126 (20 or 40μg/kgb.wt.) by oral gavage from gestation day (GD) 1 to 20. Potential effects of PCB 126 were evaluated by following the histopathological changes in the placenta by Haematoxylin and Eosin (H&E) stain and measuring the maternofetal thyroid axis (ELIZA), maternofetal body weight, and fetal growth markers (ELIZA), and cytokines (ELIZA) at embryonic day (ED) 20...
November 21, 2017: Life Sciences
https://www.readbyqxmd.com/read/29166819/pregnancy-outcomes-among-women-with-asthma
#11
Haitham Baghlaf, Andrea R Spence, Nicholas Czuzoj-Shulman, Haim Arie Abenhaim
PURPOSE: The purpose of this study is to examine the association between maternal asthma and pregnancy, delivery and neonatal outcomes. MATERIALS AND METHODS: We carried out a retrospective cohort study using the Health Care Cost and Utilization Project-Nationwide Inpatient Sample (HCUP-NIS) database from 2003 to 2011. Among women who delivered during this time period, we compared pregnancy, delivery, and neonatal outcomes in asthmatics versus non-asthmatics. Multivariate logistic regression was used to estimate adjusted odds ratios and 95% confidence intervals...
November 22, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29162475/-thyrotropin-reference-ranges-during-pregnancy-in-the-province-of-huelva-spain
#12
A Ortega Carpio, I Vázquez Rico, M A Castaño López, L Duarte González, M Montilla Álvaro, A Ruiz Reina
OBJECTIVE: The correct diagnosis of hypothyroidism during pregnancy requires knowledge of the local trimester-specific thyrotropin (TSH) reference ranges. When these are not available, the guidelines recommend upper limits of 2.5, 3.0, and 3.0μU/ml for the 1(st), 2(nd), and 3(rd) trimesters, respectively. The aim is to establish the reference range for our local population. MATERIAL AND METHODS: A population-based observational study was performed on healthy pregnant women from 11 healthcare centres in the province of Huelva...
November 18, 2017: Semergen
https://www.readbyqxmd.com/read/29160171/recent-pregnancy-is-not-associated-with-high-risk-pathological-features-of-well-differentiated-thyroid-cancer
#13
Angela J Chen, Masha J Livhits, Lin Du, James X Wu, Eric James Kuo, Michael W Yeh, Angela M Leung
BACKGROUND: Thyroid cancer is commonly diagnosed in the first postpartum year, supporting the theory that high levels of estrogen may stimulate progression of hormone-mediated thyroid cancer. The aim of this study was to assess the effect of recent pregnancy on histopathologic disease characteristics of well-differentiated thyroid cancer (WDTC). METHODS: Cases of WDTC (1999-2012) were identified from the California Cancer Registry and linked to data from the Office of Statewide Health Planning and Development...
November 21, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/29159833/maternal-hypothyroidism-in-the-perinatal-period-and-childhood-asthma-in-the-offspring
#14
Xiaoqin Liu, Stine Linding Andersen, Jørn Olsen, Esben Agerbo, Vivi Schlünssen, Shyamali Chandrika Dharmage, Trine Munk-Olsen
BACKGROUND: There is increasing interest in the possible link between maternal hypothyroidism in the perinatal period and childhood asthma risk. We explored this in the present study while accounting for the timing of hypothyroidism diagnosis. Further, we evaluated whether the risk was moderated by thyroid hormone treatment during pregnancy. METHODS: We conducted a population-based cohort study using Danish national registers. All liveborn singletons in Denmark from 1998 to 2007 were identified...
November 21, 2017: Allergy
https://www.readbyqxmd.com/read/29156995/combined-repeated-dose-and-reproductive-developmental-toxicity-screening-test-of-benzene-1-1-oxybis-tetrapropylene-derivs-in-rats
#15
Yasuhiro Tsubokura, Ryuichi Hasegawa, Sunao Aso, Toshio Kobayashi, Takayuki Koga, Satsuki Hoshuyama, Yutaka Oshima, Katsumi Miyata, Yuji Kusune, Takako Muroi, Naoki Hashizume, Yoshiyuki Inoue, Shozo Ajimi, Kotaro Furukawa
We have conducted animal toxicity tests of chemicals for a chemical safety program implemented by the Ministry of Economy, Trade and Industry of Japan. Here we conducted a combined repeated-dose and reproductive/developmental toxicity screening test of benzene, 1,1'-oxybis-, tetrapropylene derivs. (BOTD). BOTD was administered to 9-week-old Crl:CD(SD) male and female rats by gavage at 0, 40, 200, or 1000 mg/kg/day. Males were treated for 42 days including mating period. Females were treated for 42-53 days through the premating, mating, pregnancy, and until Day 4 of lactation periods...
November 20, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29154791/associations-of-early-life-urinary-triclosan-concentrations-with-maternal-neonatal-and-child-thyroid-hormone-levels
#16
Joseph M Braun, Aimin Chen, Andrew Hoofnagle, George D Papandonatos, Medina Jackson-Browne, Russ Hauser, Megan E Romano, Margaret R Karagas, Kimberly Yolton, R Thomas Zoeller, Bruce P Lanphear
BACKGROUND: Triclosan, an antimicrobial agent used in some consumer products, reduces endogenous thyroid hormone concentrations in rodents. Despite ubiquitous triclosan exposure and the importance of thyroid hormones for normal fetal development, few human studies have examined the impact of triclosan exposure on maternal, neonatal, or child thyroid hormones. METHODS: In the HOME Study, a prospective cohort from Cincinnati, OH, we measured urinary triclosan concentrations up to three times in pregnant women between 16weeks and delivery, and up to three times in children between age 1-3years...
November 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29142837/preoperative-management-in-patients-with-graves-disease
#17
REVIEW
Eliana Piantanida
Graves' disease is the most frequent cause of hyperthyroidism in iodine-sufficient geographical areas and is characterized by the presence in patients' serum of autoantibodies directed against the thyrotropin receptor (TRAb) that cause overproduction and release of thyroid hormones. Clinical presentation results from both hyperthyroidism and underlying autoimmunity. The diagnosis is based on characteristic clinical features and biochemical abnormalities. If serum thyrotropin (TSH) is low, serum free thyroxine (FT4) and free triiodothyronine (FT3) concentrations should be measured to distinguish between subclinical (with normal circulating thyroid hormones) and overt hyperthyroidism (with increased circulating thyroid hormones)...
October 2017: Gland Surgery
https://www.readbyqxmd.com/read/29142304/maternal-exposure-to-iodine-excess-throughout-pregnancy-and-lactation-induces-hypothyroidism-in-adult-male-rat-offspring
#18
Caroline Serrano-Nascimento, Rafael Barrera Salgueiro, Thiago Pantaleão, Vânia Maria Corrêa da Costa, Maria Tereza Nunes
This study aimed to investigate the consequences of maternal exposure to iodine excess (IE; 0.6 mg NaI/L) throughout pregnancy and lactation on the hypothalamus-pituitary-thyroid axis of the male offspring in adulthood. Maternal IE exposure increased hypothalamic Trh mRNA expression and pituitary Tsh expression and secretion in the adult male offspring. Moreover, the IE-exposed offspring rats presented reduced thyroid hormones levels, morphological alterations in the thyroid follicles, increased thyroid oxidative stress and decreased expression of thyroid differentiation markers (Tshr, Nis, Tg, Tpo, Mct8) and thyroid transcription factors (Nkx2...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29131489/evaluation-of-the-serum-zinc-level-in-adult-patients-with-melasma-is-there-a-relationship-with-serum-zinc-deficiency-and-melasma
#19
Majid Rostami Mogaddam, Nastaran Safavi Ardabili, Manouchehr Iranparvar Alamdari, Nasrollah Maleki, Maryam Aghabalaei Danesh
BACKGROUND: Melasma is a common acquired hypermelanosis of sun-exposed skin, particularly on the face, which presents as symmetric, light- to gray-brown-colored macules and patches. There are several studies of serum zinc levels in cutaneous disorders. So far, no studies have been carried out to assess the serum zinc level in patients with melasma. The aim of this study is to determine the serum zinc level in patients with melasma compared to healthy subjects. MATERIALS AND METHODS: A total of 118 patients with melasma and 118 healthy controls were enrolled in this prospective cross-sectional study...
November 12, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29130077/study-of-the-factors-leading-to-fetal-and-neonatal-dysthyroidism-in-children-of-patients-with-graves-disease
#20
Maïa Banigé, Candice Estellat, Valerie Biran, Luc Desfrere, Valerie Champion, Alexandra Benachi, Yves Ville, Marc Dommergues, Pierre-Henri Jarreau, Mostafa Mokhtari, Claire Boithias, Frederic Brioude, Laurent Mandelbrot, Pierre-François Ceccaldi, Delphine Mitanchez, Michel Polak, Dominique Luton
Context: Neonatal hyperthyroidism was first described in 1912 and in 1964 was shown to be linked to transplacental passage of maternal antibodies. Few multicenter studies have described the perinatal factors leading to fetal and neonatal dysthyroidism. Objective: To show how fetal dysthyroidism (FD) and neonatal dysthyroidism (ND) can be predicted from perinatal variables, in particular, the levels of anti-thyrotropin receptor antibodies (TRAbs) circulating in the mother and child...
June 2017: Journal of the Endocrine Society
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