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Period power: study reveals how hormones impact blood sugar control

NCT ID NCT07478211

Knowledge-focused Sponsor: Lia Bally Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 17, 2026 · Updated 2 times

Summary

This study looks at how the menstrual cycle changes blood sugar and energy use in women with type 1 diabetes. About 40 women will use a closed-loop insulin pump and continuous glucose monitor to track these changes. The goal is to understand how hormone shifts affect insulin needs and glucose levels, which could help improve diabetes management.

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

40 people

The number who actually took part.

Started

May 2025

Finished

Sep 2026

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

Eligible participants will be women aged 18-45 years, with a natural menstrual cycle (occurring without medical or hormonal interventions), who have Type 1 Diabetes and are willing to follow study-related procedures.

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: * Female sex assigned at birth * Type 1 diabetes for at least 12 months * Aged 18-45 years * Natural menstrual cycle (occurring without medical or hormonal interventions) * Functional insulin therapy delivered via injection or insulin pump * Willingness to follow study-related procedures * Willingness to use mechanical contraception during the time of study participation Exclusion Criteria: * Use of contraceptives or medical interventions that interfere with natural hormonal fluctuations of the menstrual cycle or cyclical bleeding * Interventions interfering with glucose or energy metabolism (other than insulin, thyroid hormone replacement or statins), as judged by the investigator, will be paused for the duration of the study, with an adequate washout duration prior to the start of data collection * Presence of any physical or psychological condition, or any medical intervention likely to interfere with the conduct of the procedures and/or their evaluation, as judged by the investigator * Pregnant or breast-feeding * Participation in another clinical study that interferes with the interpretation of the study results as judged by the investigator

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Conditions

The condition(s) this trial relates to.

type 1 diabetes mellitus type 1 diabetes mellitus 1

As listed by the trial registrant

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

Diabetes mellitus, type 1 Energy metabolism

Contacts and locations

Locations

  • Department of Diabetes, Endocrinology, Nutritional Medicine and Metabolism (UDEM), Inselspital, Bern University Hospital

    Bern, Canton of Bern, 3010, Switzerland

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