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Smartphone coaching aims to curb excess pregnancy weight gain in overweight women

NCT ID NCT03880461

Disease control Sponsor: Kaiser Permanente 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 29, 2026 · Last updated Jul 30, 2026 · Updated 1 time

Summary

This trial tests whether a mobile health program — combining a smartphone app, personalized text messages, and telephone coaching — can help overweight and obese women gain the recommended amount of weight during pregnancy. The program starts with low-intensity support and adds more help only for those who need it. Researchers will compare this approach to standard prenatal care and track weight gain, physical activity, and infant outcomes.

What this could mean

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

Active substance
a mobile health tool with personalized text messages and telephone coaching
What this could lead to
If effective, this approach could help overweight women achieve healthier weight gain during pregnancy, potentially reducing complications for mother and baby.
What could go wrong
The intervention relies on self-monitoring and motivation, which may not work for everyone. The trial is large but results depend on real-world adherence.

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

1,335 people

The number who actually took part.

Started

Jan 2021

Finished

Mar 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

21 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: * Pregnant * Women receiving prenatal care at Kaiser Permanente San Francisco and Oakland and whose obstetric care clinicians consent to participate; * Pregravid BMI 25 to \<40 (as determined from a measured pregravid weight in electronic medical record); * Has access to a smartphone and Wi-Fi; * Provides informed consent to participate. Exclusion Criteria: * Multiple births; * Planning to move out of the area during the study period; * Inability to speak, read, or understand English; * Placed on bed rest at time of enrollment; -\>15 weeks' gestation at enrollment.

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Conditions

The condition(s) this trial relates to.

Body Weight Body Weight Changes Gestational Weight Gain Obesity Overweight Signs and Symptoms

As listed by the trial registrant

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

Gestational weight gain

Contacts and locations

Locations

  • Kaiser Permanente Oakland

    Oakland, California, 94612, United States

  • Kaiser Permanente Redwood City

    Redwood City, California, 94063, United States

  • Kaiser Permanente San Francisco

    San Francisco, California, 94115, United States

  • Kaiser Permanente Santa Clara

    Santa Clara, California, 95051, United States

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