Management of Thyroid Function in Hashimoto's Thyroiditis During Pregnancy

August 2, 2021 updated by: Massimo Giusti, Centro Diagnostico Priamar

Management of Thyroid Function in Hashimoto's Thyroiditis During Pregnancy: Real-word Experience in a Secondary Endocrine Centre in Italy

The management of thyroid function in pregnancy has been object of several guidelines in the last years. Normal thyroid function reduces prenatal and post-natal risks and gestational complaints. Trimester specific reference values of thyroid hormones and thyroid stimulating hormone (TSH) are available for selected geographic population but its are not yet are available in our country. Hashimoto's thyroiditis (HT) is the most frequent autoimmune thyroid disease which can induce thyroid dysfunction, mainly sub-clinical hypothyroidism. Due to the large incidence in women HT and its potential link with thyroid dysfunction this disease could be search and monitored before pregnancy. Anyway a strong recommendation is to test TSH levels in all patients seeking pregnancy at risk for thyroid dysfunction for a history or current symptoms/signs of thyroid dysfunction, known positivity od thyroid autoimmunity or goiter, a history of neck radiation, age >30 years, diabetes mellitus, previous infertility or pregnant loss, morbid obesity, living in area of moderate-severe iodine deficiency or recent administration of drugs/substance interfering with thyroid function.

Study Overview

Detailed Description

The aim of the study was to retrospectively evaluate from 2011 (data of publication of the first American Thyroid Association (ATA) guidelines for thyroid dysfunction in pregnancy) to now medical record of the a secondary level endocrine unit to verify the adherence to guidelines in the management of thyroid function in pregnant women with HT.

The investigators search

  1. the adherence to clinical and biochemical endocrine evaluations before conception
  2. the use (correct/un-correct) of L-T4 intervention and its monitoring
  3. the difference in thyroid function control between women with a fix increment of- L-T4 posology (25 mcg/week more for each 2 kg increment in body weight) after the initial L-T4 adjustment or prescription
  4. the clinical and biochemical endocrine evaluation 1-2 months after delivery
  5. the outcome of pregnancy
  6. the e-mail up-to-date survey on current of off-springs health

Study Type


Enrollment (Anticipated)


Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years and older (Adult, Older Adult)

Accepts Healthy Volunteers


Genders Eligible for Study


Sampling Method

Non-Probability Sample

Study Population

Women with Hashimoto's thyroidis or/and gloiter


Inclusion Criteria:

Adult HT pregnant women and adult pregnant women with nodular goiter with or whiteout previous known hypothyroidism.

Exclusion Criteria:

  1. significant pre-pregnancy comorbidity including renal failure, severe liver disease, organ transplant, cardiac failure, psychiatric conditions requiring in-patient admission, history of eating disorder.
  2. unable to have e-mail address
  3. unavailable written consent
  4. unable understand Italian language

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Retrospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Control of thyroid function in pregnancy
Time Frame: Through study completion, an average of 1 year
Thyroid hormones and TSH
Through study completion, an average of 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

January 1, 2022

Primary Completion (Anticipated)

July 1, 2022

Study Completion (Anticipated)

September 1, 2022

Study Registration Dates

First Submitted

July 14, 2020

First Submitted That Met QC Criteria

November 1, 2020

First Posted (Actual)

November 3, 2020

Study Record Updates

Last Update Posted (Actual)

August 3, 2021

Last Update Submitted That Met QC Criteria

August 2, 2021

Last Verified

November 1, 2020

More Information

Terms related to this study

Other Study ID Numbers

  • Priamar001

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?


Drug and device information, study documents

Studies a U.S. FDA-regulated drug product


Studies a U.S. FDA-regulated device product


This information was retrieved directly from the website without any changes. If you have any requests to change, remove or update your study details, please contact As soon as a change is implemented on, this will be updated automatically on our website as well.

Clinical Trials on Pregnancy Related