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Blood sugar swings after bariatric surgery may forecast baby size

NCT ID NCT07731165

Knowledge-focused Sponsor: Centro Hospitalar Universitário de Santo António Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 28, 2026 · Last updated Jul 29, 2026 · Updated 1 time

Summary

Women who become pregnant after weight-loss (bariatric) surgery have a higher chance of delivering smaller-than-expected babies. This study tests whether tracking blood sugar fluctuations with a continuous glucose monitor during each trimester can help predict which babies will be small. Researchers will follow 47 pregnant women who had bariatric surgery, using a skin sensor to record glucose levels and comparing those patterns to the baby's birth weight.

What this could mean

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

Active substance
intermittently scanned continuous glucose monitoring (isCGM) device
What this could lead to
If specific glucose patterns are linked to smaller babies, doctors may be able to identify at-risk pregnancies earlier and adjust care.
What could go wrong
This is a small, single-center observational study. It can show associations but cannot prove cause and effect, and results may not apply to all patients.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

47 people

The number who actually took part.

Started

Jan 2021

Finished

Sep 2025

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.

Ages

18 years and older

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: * Pregnant women who underwent metabolic bariatric surgery * Enrollement at first or second trimesters of pregnancy Exclusion Criteria: * Twin pregnancies * Pregnancies ending in miscarriage * Pregnancies with planned delivery at other institution

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Conditions

The condition(s) this trial relates to.

dumping syndrome fetal growth restriction hypoglycemia

As listed by the trial registrant

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

Glycemic variability Hypoglycemia after gastric bypass Small gestational age (SGA)

Contacts and locations

Locations

  • CHUStAntónio - Centro Materno Infantil Norte (CMIN)

    Porto, Porto District, 4050-651, Portugal

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