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Birth control pills and IUDs may change how your body handles sugar

NCT ID NCT07169591

Knowledge-focused Sponsor: McMaster University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study looks at how different types of hormonal birth control affect the way young, healthy women process sugar. Researchers will compare three groups: women not on birth control, those taking birth control pills, and those using an IUD. Participants will drink a sugary solution and have blood drawn over two hours to measure glucose and insulin levels.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this study could help explain how different types of hormonal birth control affect blood sugar regulation and long-term metabolic health.
What could go wrong
This is an early observational study with only 54 participants, so results may not apply to everyone. It looks at short-term glucose responses, not long-term health outcomes.

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 54 people

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

Expected to start

Oct 2025

An estimate. Start dates often move.

Expected to finish

Oct 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

We will recruit 54 young healthy recreationally active females (n=18 per group) 18-45 years of age from the following groups: 1) individuals currently taking second generation OCPs containing levonorgestrel, 2) individuals with a levonorgestrel-releasing IUD, and 3) NAT individuals.

Ages

18 to 45 years

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Within 18-45 years * BMI between 18.5 and 30.0 kg/m2 * Weight stable for the past 6 months (± 2kg) * VO2peak values within a below average to above average rangea * Fasting blood glucose \<6.0 mMb * Resting blood pressure \<140/90 mmHg NAT females: • Regular menstrual cycle for \> 6 months (defined as a cycle length of 21-35 days) OCP users: * Use of combined OCPs as prescribed for \> 3 months * Second generation levonorgestrel drugs only * Monophasic formulations only (Alesse, Alysena, Audrina, Aviane, Min-Ovral, Ovima, or Portia) IUD users: * Insertion of IUD no fewer than 3 months prior to beginning of study * Hormonal, levonorgestrel-releasing IUD (Kyleena or Mirena) Exclusion Criteria: * Smoking * Diabetes, cancer, or other metabolic disorders * Cardiac or gastrointestinal problems * Infectious disease * Barium swallow or nuclear medicine scan in the previous 3 weeks * Pregnant or breastfeeding * Diagnosis of polycystic ovary syndrome * Endometriosis * Use of emergency contraception (e.g., Plan B) within the previous 3 months NAT females: • Use of any type of hormonal contraceptive in the previous 3 months OCP users: * Not using OCP as prescribed (e.g. missing doses or taking drug inconsistently) * Use of OCP for longer than 3 years. IUD users: * Insertion of Kyleena IUD longer than 2 years. * Insertion of Mirena IUD longer than 4 years.

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Conditions

The condition(s) this trial relates to.

Insulin Resistance

As listed by the trial registrant

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

Glucose homeostasis

How to take part

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  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

  • McMaster University, Ivor Wynne Centre

    RECRUITING

    Hamilton, Ontario, L8S 4K1, Canada

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