Calcium supplement may speed up labor and cut C-Sections
NCT ID NCT06352775
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This pilot study tests whether giving calcium carbonate to pregnant women during labor induction can shorten the time needed and reduce the need for C-sections. Researchers will compare 250 women who receive calcium with a historical control group. The goal is to see if this simple, low-cost approach is safe and effective.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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
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250 people
The number who actually took part.
- Started
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Jun 2024
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Adult laboring patients ( ≥ 18 years of age) * Able to speak and read English or Spanish (for historical cohort, preferred language should be English or Spanish) * Singleton gestation * Greater ≥ 37 weeks gestation in vertex presentation * Present for induction of labor inclusive of medical indication, elective indication at greater than 39 weeks gestation, trial of labor after cesarean * Receive standard-dose oxytocin during induction Exclusion Criteria: * Participants will be excluded from the study if they do not meet the above inclusion criteria or they will be further excluded under the following circumstances: * Known need for cesarean section prior to induction of labor * Known allergy to calcium carbonate * Known contraindication to taking calcium carbonate including renal calculus, high urine calcium levels, elevated serum calcium, low serum phosphate, achlorhydria, or suspected digoxin toxicity. * Inability to tolerate oral intake (i.e., nausea/vomiting) * Need to be nothing by mouth (NPO)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Aurora Sinai Medical Center
Milwaukee, Wisconsin, 53233, United States
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Other studies related to the condition(s) this trial covers.
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