Association of Maternal Thyroid Function and Anxiety With Fetal Cardiotocography Parameters in High-Risk Pregnancies

August 15, 2026 updated by: Doruk Cevdi Katlan, Istanbul Training and Research Hospital

Association Between Maternal Thyroid Functions, Anxiety Levels, and Fetal Cardiotocography Parameters in High-Risk Pregnancies

This prospective observational study aims to investigate the association between maternal thyroid function, maternal anxiety levels, and fetal cardiotocography parameters in high-risk pregnancies. Pregnant women at 32 weeks of gestation or later who are followed in the perinatology outpatient clinic for high-risk pregnancy will be included.

Maternal thyroid function test results, including thyroid-stimulating hormone (TSH) and free thyroxine (fT4), obtained as part of routine clinical care will be recorded. Maternal anxiety will be assessed using the Beck Anxiety Inventory. Fetal well-being will be evaluated using a routine 20-minute non-stress test (NST), including baseline fetal heart rate, accelerations, reactivity, and the presence of decelerations.

The associations between maternal anxiety scores, thyroid hormone levels and thyroid status, and fetal cardiotocography parameters will be analyzed. Sociodemographic and obstetric characteristics will also be evaluated in relation to these parameters.

Study Overview

Status

Recruiting

Conditions

Study Type

Observational

Enrollment (Estimated)

150

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

Study Locations

  • Turkey (Türkiye)
      • Istanbul, Turkey (Türkiye)
        • Recruiting
        • Istanbul Training and Research Hospital
        • Contact:
        • Sub-Investigator:
          • Nebahat Uzunay
        • Sub-Investigator:
          • Filiz Değirmenci

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

  • Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population will consist of women with high-risk singleton pregnancies at 32 weeks of gestation or later who are followed at the Perinatology Outpatient Clinic of Istanbul Training and Research Hospital and who undergo routine thyroid function testing and non-stress testing.

Description

Inclusion Criteria:

  • Singleton pregnancy at 32 weeks of gestation or later
  • Pregnancy being followed as a high-risk pregnancy
  • Age between 18 and 45 years
  • Availability of routine thyroid function test results and non-stress test assessment
  • Ability and willingness to provide written informed consent

Exclusion Criteria:

  • Gestational age below 32 weeks
  • Multiple pregnancy
  • Fetal conditions that may affect interpretation of the non-stress test tracing
  • Acute maternal infection
  • Presence of an acute obstetric condition
  • Previously diagnosed psychiatric disorder
  • Current use of psychiatric medication
  • Age younger than 18 years or older than 45 years

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

Cohorts and Interventions

Group / Cohort
High-Risk Pregnant Women
Pregnant women with singleton high-risk pregnancies at 32 weeks of gestation or later who undergo routine thyroid function testing and non-stress testing as part of their clinical follow-up. Maternal anxiety will be assessed using the Beck Anxiety Inventory.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Association Between Maternal Anxiety Level and NST Parameters
Time Frame: At study enrollment, during the same-day assessment
The association between Beck Anxiety Inventory scores and fetal non-stress test parameters will be evaluated.
At study enrollment, during the same-day assessment
Association Between Maternal Thyroid Function and NST Parameters
Time Frame: At study enrollment, using third-trimester thyroid function test results and same-day NST assessment
The association between maternal TSH and free T4 levels and fetal non-stress test parameters will be evaluated.
At study enrollment, using third-trimester thyroid function test results and same-day NST assessment

Secondary Outcome Measures

Outcome Measure
Time Frame
Association of Sociodemographic and Obstetric Characteristics With Maternal Anxiety, Thyroid Function, and NST Parameters
Time Frame: At study enrollment, using third-trimester thyroid function test results and same-day NST and anxiety assessment
At study enrollment, using third-trimester thyroid function test results and same-day NST and anxiety assessment

Collaborators and Investigators

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

Sponsor

Istanbul Training and Research Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. 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 (Actual)

March 27, 2026

Primary Completion (Estimated)

April 1, 2028

Study Completion (Estimated)

December 1, 2028

Study Registration Dates

First Submitted

August 15, 2026

First Submitted That Met QC Criteria

August 15, 2026

First Posted (Actual)

August 19, 2026

Study Record Updates

Last Update Posted (Actual)

August 19, 2026

Last Update Submitted That Met QC Criteria

August 15, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • ISTANBUL TRH - 27.03.2026-100

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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

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