Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT00274261 · ClinicalTrials.gov registry record · Phase 3
Study of the Safety and Contraceptive Efficacy of C31G Compared to Conceptrol®
A Phase 3 study, sponsored by Premier Research.
- Completed
- Registry status
- Phase 3
- Development phase
- 1,565
- Enrollment target
NCT00274261: Completed Phase 3 study, sponsored by Premier Research.
NCT00274261 is a Phase 3 study that has completed, run by Premier Research. The registered enrollment target is 1,565 participants, above the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (103% higher). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00274261, a Phase 3 study, has completed, sponsored by Premier Research.
- COMPLETED
- Registry status
- Phase 3
- Development phase
- 1,565 participants
- Enrollment target
Study Summary
This is a multicenter, randomized, double-masked, controlled, phase III study of repeated use of C31G vaginal gel compared to Conceptrol® Vaginal Gel as the primary method of contraception over six months (183 days) and at least six cycles of use. In addition, there is an opportunity for subjects to continue with study treatment for up to twelve months (365 days) and twelve cycles of treatment upon completion of the first six months of treatment.
Primary Outcome
Number of pregnancies in women using C31G gel for 6 months (183 days) compared to women using Conceptrol gel for the same time frame.
Interventions
- DRUG C31G
- DRUG nonoxynol-9 (N-9)
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 1,565 participants |
| Start Date | 2004-06 |
| Est. Completion | 2008-09 |
| Phase | Phase 3 |
What the finished NCT00274261 record still lists
NCT00274261 is an interventional study that assigns participants to a tested intervention. Its 1,565 participants enrollment target places it among the larger protocols in the corpus, above the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (103% higher).
The record links to 0 conditions, and to 2 interventions - of which C31G is the first listed.
NCT00274261 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00274261 about?
NCT00274261 is a clinical study titled "Study of the Safety and Contraceptive Efficacy of C31G Compared to Conceptrol®". This is a multicenter, randomized, double-masked, controlled, phase III study of repeated use of C31G vaginal gel compared to Conceptrol® Vaginal Gel as the primary method of contraception over six months (183 days) and at least six cycles of use. In addition, there is an opportunity for subjects to...
What is the current status of trial NCT00274261?
This trial is currently completed. It is a Phase 3 study. The enrollment target is 1,565 participants. The study started on 2004-06. Estimated completion is 2008-09.
What interventions are being tested in trial NCT00274261?
The interventions under investigation include: C31G (DRUG), nonoxynol-9 (N-9) (DRUG).
Who is sponsoring clinical trial NCT00274261?
This trial is sponsored by Premier Research, which has 14 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00274261's enrollment target sits among peer trials
1,565 150th of 2000 higher than 1,851 of 2,000 other Phase 3 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 3 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
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT06034080 · 1,566 participants · NA
Interventions to De-implement Unnecessary Antibiotic Prescribing for Children With Ear Infections
- NCT06881069 · 1,560 participants · NA
Reach Through Equitable Implementation in Utah
- NCT06445946 · 1,572 participants · Phase 4
DECIDE: A Comparative Effectiveness Trial of Metformin Versus Insulin for the Treatment of Gestational Diabetes
- NCT05483855 · 1,580 participants
Telehealth-delivered HealthcaRe to ImproVe Care
Similar registry start date
- NCT05988463 · started 2027-01-01 · Phase 1
Dose-Escalation Study of Artesunate Patients With IPF
- NCT07219706 · started 2026-12-10 · NA
Dietary Fiber and Time Restricted Eating
- NCT02831335 · started 2026-12-01
Technical Development of Multi-Parametric Renocerebral MRI
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia