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Thyroid drug may boost IVF success in women with mild hypothyroidism

NCT ID NCT07257250

Disease control Sponsor: Mỹ Đức Hospital Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether giving levothyroxine (a thyroid hormone medication) to women with subclinical hypothyroidism (a mild underactive thyroid) can improve their chances of having a baby through IVF. About 900 women aged 18-45 will be included, and researchers will compare those who receive the drug to those who don't. The goal is to see if treatment leads to more live births and healthier pregnancies.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 900 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2019

Expected to finish

Mar 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Infertile women aged 18-45 years diagnosed with subclinical hypothyroidism (TSH 4.2-\<10 mIU/L, normal FT4) who underwent IVF/ICSI with subsequent frozen embryo transfer (FET) at My Duc Hospital and My Duc Phu Nhuan Hospital, Ho Chi Minh City, Vietnam, between 2019 and 2024.

Ages

18 to 45 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Women aged 18-45 years. * Diagnosed with subclinical hypothyroidism (TSH 4.2-\<10 mIU/L with FT4 0.92-1.68 ng/dL). * Undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) followed by frozen embryo transfer (FET). Exclusion Criteria: * Overt hypothyroidism (TSH ≥10 mIU/L and FT4 ≤0.92 ng/dL). * Current or recent (within 1 month) use of drugs affecting thyroid function (levothyroxine, amiodarone, methimazole, propylthiouracil).

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Conditions

The condition(s) this trial relates to.

Abortion, Spontaneous hypothyroidism infertility disorder thyroid gland disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Assisted reproductive technology Frozen embryo transfer (FET) In vitro fertilization (IVF) Infertility Intracytoplasmic sperm injection Subclinical hypothyroidism

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • My Duc Hospital

    RECRUITING

    Ho Chi Minh City, Ho Chi Minh, 700000, Vietnam

  • My Duc Hospital

    COMPLETED

    Ho Chi Minh City, Ho Chi Minh, 700000, Vietnam

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