Oral Contraceptive Hormone-free Interval Pituitary/ Ovarian Activity
Public ClinicalTrials.gov record NCT01953211. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
LH, FHS, Estradiol and Progesterone Activity During the 7-Day Hormone-Free Interval of Various Combined Oral Contraceptive Regimens
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The degree of suppression and subsequent activation of the hypothalamic-pituitary-ovarian axis during the hormone-free interval in combined oral contraceptive (COC) hormone users varies depending on the dose of ethinyl estradiol in the formulation. This variation in activation may be associated with different side effects during the hormone free interval. Progesterone (P) remained suppressed during all 6 COC regimens (\<1.8 ng/mL), which indicates continuous contraceptive efficacy during the 7-day hormone free interval of all formulations studied.
Study identification
- NCT ID
- NCT01953211
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 64 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years to 35 Years
- Sex
- Female
- Healthy volunteers
- Not listed
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Not listed
- Primary completion
- Nov 30, 1998
- Completion
- Not listed
- Last update posted
- Jul 25, 2019
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| LAC and USC Medical Center | Los Angeles | California | — | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01953211, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 25, 2019 · Synced Sep 2, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01953211 live on ClinicalTrials.gov.