Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy

Objective: Adverse maternal outcomes and perinatal complications are associated with overt and subclinical maternal hypothyroidism. It is not clear whether these complications also occur in women with isolated hypothyroxinemia during pregnancy. The aim of this study was to evaluate the effects of is...

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Main Authors: Liangmiao Chen, Hong Yang, Enling Ye, Zhenzhen Lin, Mengmeng Peng, Hai Lin, Lechu Yu, Zhuhua Cai, Xuemian Lu
Format: Article
Language:English
Published: Frontiers Media S.A. 2020-10-01
Series:Frontiers in Endocrinology
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fendo.2020.528146/full
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author Liangmiao Chen
Liangmiao Chen
Hong Yang
Enling Ye
Zhenzhen Lin
Mengmeng Peng
Hai Lin
Lechu Yu
Zhuhua Cai
Xuemian Lu
author_facet Liangmiao Chen
Liangmiao Chen
Hong Yang
Enling Ye
Zhenzhen Lin
Mengmeng Peng
Hai Lin
Lechu Yu
Zhuhua Cai
Xuemian Lu
author_sort Liangmiao Chen
collection DOAJ
description Objective: Adverse maternal outcomes and perinatal complications are associated with overt and subclinical maternal hypothyroidism. It is not clear whether these complications also occur in women with isolated hypothyroxinemia during pregnancy. The aim of this study was to evaluate the effects of isolated hypothyroxinemia on maternal and perinatal outcomes during pregnancy.Methods: This study included data from 2,864 pregnant women in the first trimester (67 women with isolated hypothyroxinemia, 784 euthyroid women) and the second trimester (70 women with isolated hypothyroxinemia, 1,943 euthyroid women) of pregnancy. Maternal serum samples were collected in the first and second trimesters to examine thyroid hormone concentration. Hypothyroxinemia was defined as a normal maternal thyroid-stimulating hormone concentration with a low maternal free thyroxine concentration and negative thyroid autoantibodies. The following maternal outcomes were recorded: gestational hypertension, gestational diabetes mellitus, placenta previa, placental abruption, prelabor rupture of membranes, and premature delivery. Perinatal outcomes, including fetal growth restriction, fetal distress, low birth weight, intrauterine fetal death, and malformation. The incidence of adverse pregnancy outcomes and perinatal complications was compared between women in the first trimester and second trimester with isolated hypothyroxinemia.Results: There were no significant differences in the incidence rates of adverse maternal outcomes and perinatal complications between patients in the first and second trimesters with isolated hypothyroxinemia.Conclusion: The results of this study indicate that isolated hypothyroidism does not increase the incidence of adverse maternal outcomes and perinatal complications.
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spelling doaj.art-f432edc56f96423eaa0fa79011e3f0602022-12-21T22:46:10ZengFrontiers Media S.A.Frontiers in Endocrinology1664-23922020-10-011110.3389/fendo.2020.528146528146Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of PregnancyLiangmiao Chen0Liangmiao Chen1Hong Yang2Enling Ye3Zhenzhen Lin4Mengmeng Peng5Hai Lin6Lechu Yu7Zhuhua Cai8Xuemian Lu9Department of Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaDepartment of Obstetrics and Gynecology, Center for Reproductive Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, ChinaDepartment of Endocrinology, Third Affiliated Hospital of Wenzhou Medical University, Ruian, ChinaObjective: Adverse maternal outcomes and perinatal complications are associated with overt and subclinical maternal hypothyroidism. It is not clear whether these complications also occur in women with isolated hypothyroxinemia during pregnancy. The aim of this study was to evaluate the effects of isolated hypothyroxinemia on maternal and perinatal outcomes during pregnancy.Methods: This study included data from 2,864 pregnant women in the first trimester (67 women with isolated hypothyroxinemia, 784 euthyroid women) and the second trimester (70 women with isolated hypothyroxinemia, 1,943 euthyroid women) of pregnancy. Maternal serum samples were collected in the first and second trimesters to examine thyroid hormone concentration. Hypothyroxinemia was defined as a normal maternal thyroid-stimulating hormone concentration with a low maternal free thyroxine concentration and negative thyroid autoantibodies. The following maternal outcomes were recorded: gestational hypertension, gestational diabetes mellitus, placenta previa, placental abruption, prelabor rupture of membranes, and premature delivery. Perinatal outcomes, including fetal growth restriction, fetal distress, low birth weight, intrauterine fetal death, and malformation. The incidence of adverse pregnancy outcomes and perinatal complications was compared between women in the first trimester and second trimester with isolated hypothyroxinemia.Results: There were no significant differences in the incidence rates of adverse maternal outcomes and perinatal complications between patients in the first and second trimesters with isolated hypothyroxinemia.Conclusion: The results of this study indicate that isolated hypothyroidism does not increase the incidence of adverse maternal outcomes and perinatal complications.https://www.frontiersin.org/article/10.3389/fendo.2020.528146/fullisolated hypothyroxinemiafirst trimestersecond trimesterpregnancy outcomematernal outcomeperinatal complication
spellingShingle Liangmiao Chen
Liangmiao Chen
Hong Yang
Enling Ye
Zhenzhen Lin
Mengmeng Peng
Hai Lin
Lechu Yu
Zhuhua Cai
Xuemian Lu
Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy
Frontiers in Endocrinology
isolated hypothyroxinemia
first trimester
second trimester
pregnancy outcome
maternal outcome
perinatal complication
title Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy
title_full Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy
title_fullStr Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy
title_full_unstemmed Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy
title_short Insignificant Effect of Isolated Hypothyroxinemia on Pregnancy Outcomes During the First and Second Trimester of Pregnancy
title_sort insignificant effect of isolated hypothyroxinemia on pregnancy outcomes during the first and second trimester of pregnancy
topic isolated hypothyroxinemia
first trimester
second trimester
pregnancy outcome
maternal outcome
perinatal complication
url https://www.frontiersin.org/article/10.3389/fendo.2020.528146/full
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