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NCT07651800 · ClinicalTrials.gov registry record · NA
Energy Deficiency on Hormones in Contraceptive Users
A NA study, sponsored by University of Southern California.
- Not yet
- Registry status
- NA
- Development phase
- 30
- Enrollment target
NCT07651800: Clinical Trial NA study, sponsored by University of Southern California.
NCT07651800 is a NA study that has not yet begun recruiting, run by University of Southern California. The registered enrollment target is 30 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (98% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT07651800, a NA study, has not yet begun recruiting, sponsored by University of Southern California.
- NOT YET RECRUITING
- Registry status
- NA
- Development phase
- 30 participants
- Enrollment target
Study Summary
The purpose of the present study is to characterize the endocrine and metabolic responses to a modest, short-term energy deficiency (\~250 kcal/day) across the menstrual cycle in recreationally active women using different contraceptive methods (oral contraceptive, hormonal IUD, and non-hormonal IUD). This study will leverage daily urinary hormone metabolite tracking and comprehensive metabolic assessments, providing foundational data addressing an important and previously unexamined interaction between energy availability and hormonal regulation in contraceptive users.
Primary Outcome
Participants will be asked to track daily urine concentrations of estrogen and progesterone throughout a baseline (i.e., non-energy-deficient state) menstrual cycle and a menstrual cycle with an imposed energy deficit. The outcome will compare hormone exposure measured by the urinary concentrations between the two cycles.
Interventions
- BEHAVIORAL Energy Deficiency of approximately ~250 kcal/day
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 30 participants |
| Start Date | 2026-09 |
| Est. Completion | 2027-12 |
| Phase | NA |
What is known before NCT07651800 opens enrollment
NCT07651800 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 30 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (98% lower).
The record links to 0 conditions, and to 1 intervention - of which Energy Deficiency of approximately ~250 kcal/day is the first listed.
NCT07651800 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT07651800 about?
NCT07651800 is a clinical study titled "Energy Deficiency on Hormones in Contraceptive Users". The purpose of the present study is to characterize the endocrine and metabolic responses to a modest, short-term energy deficiency (\~250 kcal/day) across the menstrual cycle in recreationally active women using different contraceptive methods (oral contraceptive, hormonal IUD, and non-hormonal IUD...
What is the current status of trial NCT07651800?
This trial is currently not yet recruiting. It is a NA study. The enrollment target is 30 participants. The study started on 2026-09. Estimated completion is 2027-12.
What interventions are being tested in trial NCT07651800?
The interventions under investigation include: Energy Deficiency of approximately ~250 kcal/day (BEHAVIORAL).
Who is sponsoring clinical trial NCT07651800?
This trial is sponsored by University of Southern California, which has 617 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT07651800's enrollment target sits among peer trials
30 1593rd of 2000 higher than 299 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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