NCT04205370 · University of Michigan
Sleep Behaviors in Pregnancy
What this study is about
The researchers would like to know how long pregnant women spend in different positions during the night - and how often women change positions - across pregnancy.
View original scientific description
The researchers would like to know how long pregnant women spend in different positions during the night - and how often women change positions - across pregnancy.
Interventions
DEVICE
Deactivated Pregnancy Coach
Naturalistic monitoring of their typical sleep patterns and behaviors
DEVICE
Active Pregnancy Coach
The Pregnancy Coach will begin to deliver alerts when supine sleep is detected. Sleep metrics will be visible on the smartphone app.
Primary outcome measures
Proportion of sleep time spent in the supine position as measured by the Pregnancy Coach
Time frame: Until delivery, approximately 12 weeks
Will be conducted using the naturalistic arm (deactivated device). Simple descriptive statistics to report the average number of minutes and the average proportion of supine sleep per week.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- At least 28 weeks pregnant
- Receiving pre-natal care at Michigan Medicine
- Have either and Android or iPhone smartphone
Exclusion criteria
- Less then 28 weeks pregnant
- Receiving pre-natal care external to Michigan Medicine
- Does not poses a smartphone
Where
- Ann Arbor, Michigan
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced May 11, 2026 · Source of record for eligibility and locations