Clinical Trials Logo

Clinical Trial Summary

The purpose of this 1-year study is to evaluate the efficacy and safety of a new contraceptive vaginal ring (CVR) delivering low doses of Nestorone (NES), a new, nonandrogenic progestin, and ethinyl estradiol (EE), an estrogen used in oral contraceptives. The CVR, which is made of silicone rubber, is designed to be used for 1 year (13 menstrual cycles) before replacement is required.


Clinical Trial Description

The objective of this study is to evaluate the contraceptive efficacy, cycle control, and safety of a reusable CVR delivering low daily doses of NES and EE for a 1-year (13-cycle) period.

Nestorone is a potent, nonandrogenic, 19-norprogesterone derivative, which is not active when given orally, but is highly active when delivered via non-oral delivery systems, such as CVRs, implants, or transdermal preparations. The high potency of NES makes it an excellent candidate for use in contraceptive delivery systems designed to be effective for prolonged periods. This characteristic of Nestorone has been utilized in the design of a contraceptive vaginal ring that releases low daily doses of both NES and EE and is effective for a 1-year (13-cycle) period. The NES/EE vaginal ring is a long-acting contraceptive device, but, unlike other long-term methods, it use is controlled by the woman without the need for medical intervention.

The efficacy of NES/EE vaginal ring in preventing pregnancy during a 1-year (13-cycle) period will be studied in women who have regular sexual activity and use no other form of contraception. The Pearl index for all women (18-<40) and Kaplan-Meier life table analyses will be assessed for all subjects and for subjects £ 35 years and will provide supportive analyses for demonstrating efficacy. Pearl indices will be based on all cycles and on all cycles for which back-up contraception is not used.

The number of bleeding/spotting days per cycle or reference period will be used to evaluate cycle control. Safety will be evaluated by regular assessments of blood pressure, pulse, and body weight and by laboratory testing and Pap smears at screening and termination, and by the frequencies of adverse events and serious adverse events. Additional safety evaluations will be obtained in a companion Phase 3 study conducted by the NIH (Protocol CCN006) with three substudies to evaluate 1) the effect of treatment on 4 hepatic proteins that may be associated with a risk for thromboembolism; 2) the effect of reusing the same CVR for 13 consecutive cycles on vaginal flora and the risk of infection; and 3) the effect of vaginal delivery of NES and EE on the endometrium.

A nested pharmacokinetics/pharmacodynamics/safety study is also being conducted in a subset of 39 patients. Blood samples are drawn during study cycles 1, 3, and 13 in order to assess ovulation suppression, measured by serum progesterone concentration, and the pharmacokinetics of NES and EE. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT00263341
Study type Interventional
Source Population Council
Contact
Status Completed
Phase Phase 3
Start date December 2005
Completion date August 2014

See also
  Status Clinical Trial Phase
Completed NCT02577601 - Impact of Combined Hormonal Contraceptives on UPA Phase 4
Completed NCT03153644 - Improving Contraceptive Care for Women With Medical Conditions
Completed NCT04112095 - Adherence With Continuous-dose Oral Contraceptive: Evaluation of Self-Selection and Use Phase 3
Recruiting NCT05521646 - Implementing Best Practice Postpartum Contraceptive Services Through a Quality Improvement Initiative N/A
Active, not recruiting NCT04291001 - Ovarian Function With ENG Implant and UPA Use Early Phase 1
Completed NCT04568980 - Assessment of Contraceptive Safety and Effectiveness in Cystic Fibrosis
Completed NCT03438682 - Real World Effectiveness and Safety of Hysteroscopic (Essure®) Compared to Laparoscopic Sterilization
Active, not recruiting NCT01948882 - Evaluation of Safety and Effectiveness of the Essure (Model ESS505) Device to Prevent Pregnancy in Women N/A
Enrolling by invitation NCT04997499 - Adolescent Subcutaneous (SQ) Injection Video Validation N/A
Recruiting NCT03589040 - Darunavir and Rilpivirine Interactions With Etonogestrel Contraceptive Implant Phase 2
Completed NCT04463680 - Rifampin and the Contraceptive Implant Phase 4
Completed NCT03154125 - Sayana® Press Extension Study Phase 3
Withdrawn NCT03725358 - A Cluster-RCT to Increase the Uptake of LARCs Among Adolescent Females and Young Women in Cameroon. N/A
Completed NCT02957630 - "E4/DRSP Endocrine Function, Metabolic Control and Hemostasis Study" Phase 1/Phase 2
Completed NCT02718222 - Impact and Performance of Institutionalizing Immediate Post-partum IUD Services N/A
Completed NCT02456584 - Pharmacodynamics and Pharmacokinetics Study of Existing DMPA Contraceptive Methods Phase 1
Recruiting NCT02121067 - LNG-IUS at 2 Weeks Postpartum Phase 4
Terminated NCT02169869 - Immediate Postplacental IUD Insertion N/A
Recruiting NCT02292056 - Medication Safety and Contraceptive Counseling for Reproductive Aged Women With Psychiatric Conditions N/A
Withdrawn NCT01930994 - Kenya Sino-implant (II) PK Study N/A