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Radiopaque Etonogestrel

Phase 3

Contraception | Small molecule | Endocrine |Organon & Co.|Last Updated: Feb 18, 2026

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials2
Total Enrollment799

FDA Designations

No designations recorded

Clinical trial landscape

Radiopaque Etonogestrel · 2 trials · 1 indication

Phase 3 2
NCT04626596A Study to Assess Contraceptive Efficacy and Safety of Etonogestrel (ENG) Implant Beyond 3 Years of Use (MK-8415-060)Contraception
COMPLETED498 Analytics
NCT00620035A Multicenter Trial to Evaluate the Insertion Characteristics of the Radiopaque Etonogestrel Implant Using a Next Generation Applicator (34530)(P05702)Contraception
COMPLETED301 Analytics
PHASE3COMPLETED
A Study to Assess Contraceptive Efficacy and Safety of Etonogestrel (ENG) Implant Beyond 3 Years of Use (MK-8415-060)
ContraceptionUnlock trial analytics
PHASE3COMPLETED
A Multicenter Trial to Evaluate the Insertion Characteristics of the Radiopaque Etonogestrel Implant Using a Next Generation Applicator (34530)(P05702)
ContraceptionUnlock trial analytics

Study Endpoints

Primary Endpoints

Pregnancy Rate (Pearl Index) for At Risk Cycles During Extended-Duration Use
Up to 24 months

The Pearl Index is expressed as the number of on-treatment pregnancies per 100 woman-years of exposure. An on-treatment pregnancy is defined as a confirmed pregnancy with an estimated date of conception 36 months to 60 months since the date of implant insertion. Exposure in 100 woman-years is equal to the number of cycles of use/1300, and one woman-year is defined as a period of 13 treatment cycles, each 28 days long. Only "at risk" cycles for conception will be included in this Pearl Index calculation. An at risk cycle is defined as a cycle during which participants with ENG implant had affirmed heterosexual intercourse without the use of additional contraception.

Pregnancy Rate (Pearl Index) for Alternative At Risk Cycles During Extended-Duration Use
Up to 24 months

The Pearl Index is expressed as the number of on-treatment pregnancies per 100 woman-years of exposure. An on-treatment pregnancy is defined as a confirmed pregnancy conceived with an estimated date of conception 36 months to 60 months since the date of implant insertion. Exposure in 100 woman-years is equal to the number of cycles of use/1300, and one woman-year is defined as a period of 13 treatment cycles, each 28 days long. Only "alternative at risk" cycles will be included in this Pearl Index calculation. An alternative at risk cycle is defined as a cycle in which participants with ENG implant did not use additional contraception, but without the requirement for affirmed heterosexual intercourse.

Number of Participants Who Experience One or More Adverse Events During Extended-Duration Use
Up to approximately 27 months

An adverse event (AE) is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention.

Number of Participants Who Discontinue Treatment (Implant Removed) Due to an Adverse Event During Extended-Duration Use
Up to approximately 24 months

An adverse event (AE) is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention.

Percentage of Applicator Users Who Were Very Satisfied and Satisfied- User Satisfaction Questionnaire for Domain: Design & Technical Aspects
Day 1

In order to evaluate efficacy and ease of use of the Next Generation Applicator (NGA), the investigator/applicator user (AU) completed a User Satisfaction Questionnaire on Day 1 after the 12th implant insertion. The domain, 'Design/technical aspects' consisted of five questions: fit of the applicator in the hand, size, weight, handling, and color of the applicator were assessed. The percentage of AUs who were very satisfied and satisfied was presented.

Percentage of Applicator Users Who Were Very Satisfied and Satisfied- User Satisfaction Questionnaire for Domain: Functionality
Day 1

In order to evaluate efficacy and ease of use of the NGA, the investigator/AU completed a User Satisfaction Questionnaire on Day 1 after the 12th implant insertion. The domain, 'Functionality' consisted of six questions assessing functionality of the needle. The percentage of AUs who were very satisfied and satisfied was presented.

Percentage of Applicator Users Who Were Very Satisfied and Satisfied- User Satisfaction Questionnaire by Domain: Safety
Day 1

In order to evaluate efficacy and ease of use of the NGA, the investigator/AU completed a User Satisfaction Questionnaire on Day 1 after the 12th implant insertion. The domain, 'Safety' consisted of three questions: removal of the protection cap from applicator, full retraction of the needle into the applicator after insertion, difference in colors of the obturator \& the implant. The percentage of AUs who were very satisfied and satisfied was presented.

Percentage of Applicator Users Who Were Very Satisfied and Satisfied- User Satisfaction Questionnaire for Domain: Used Time
Day 1

In order to evaluate efficacy and ease of use of the NGA, the investigator/AU completed a User Satisfaction Questionnaire on Day 1 after the 12th implant insertion. The domain, 'Used Time' consisted of one question: insertion time was assessed. The percentage of AUs who were very satisfied and satisfied was presented.

Percentage of Applicator Users Who Were Very Satisfied and Satisfied- User Satisfaction Questionnaire for Domain: Applicator Satisfaction
Day 1

In order to evaluate efficacy and ease of use of the NGA, the investigator/AU completed a User Satisfaction Questionnaire on Day 1 after the 12th implant insertion. The domain, 'Applicator Satisfaction' consisted of one question in order to assess the applicator. The percentage of AUs who were very satisfied and satisfied was presented.

Implant Insertion Time (Seconds)
Day 1

The implant insertion time was the time expressed in seconds, from removal of the protection cap from the applicator until retraction of the needle from the arm after insertion. Data was presented for overall investigators including experienced and non-experienced.

Implant Removal Time (Seconds)
Day 1

The implant removal time was the time expressed in seconds, from making the removal incision until placing the butterfly closure. Data was presented for overall investigators including experienced and non-experienced.

Secondary Endpoints

Pregnancy Rate (Pearl Index) for At Risk Cycles During Year 4 of Implant Use
Up to 12 months
Pregnancy Rate (Pearl Index) for At Risk Cycles During Year 5 of Implant Use
Up to 12 months
Cumulative Pregnancy Rate During 5 Years of Implant Use
Up to 60 months (From 3 years prior to study entry to 2 years after study entry)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposePREVENTION

Treatment Arms

ArmTypeDescription
ENG implantEXPERIMENTALParticipants will have the ENG 68 mg implant inserted and in place for 36 months before enrollment. The ENG implant will remain in place for an additional 24 months.
Radiopaque Etonogestrel ImplantEXPERIMENTALRadiopaque Etonogestrel Implant (drug) inserted with the Next Generation Applicator (NGA) The Radiopaque Implant is a single rod contraceptive implant of 4 cm length and 2 mm in diameter which is placed at the inner side of the non-dominant upper-arm about 8-10 cm above the medial epicondyle. The Radiopaque Implant contains approximately 68 mg etonogestrel (ENG) dispersed in a matrix of ethylene vinyl acetate (EVA) copolymer and barium sulfate, surrounded by an EVA membrane. The barium-sulfate provides radio-opacity and allows detection by X-ray. The ENG dose released from the implant amounts to about 60-70 mcg/day shortly after insertion and decreases to about 40 mcg/day at the start of the second year, and to about 25-30 mcg/day at the end of the third year.

Interventions

NameTypeDescription
Radiopaque Etonogestrel (ENG) ImplantCOMBINATION_PRODUCT68 mg subdermal implant
Radiopaque Etonogestrel ImplantDRUGOne implant inserted for a 3-year treatment period
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Eligibility Criteria

Age RangeN/A to 35 Years
SexFEMALE
Healthy VolunteersNo
Study Sites67

Inclusion Criteria: * Not diagnosed with perimenopause or menopause. * Heterosexually active with a partner who is not known to be subfertile, sterilized, or infertile, and is seeking contraception for pregnancy. * Palpable intact ENG implant in the upper inner-arm for 36 months from the date of in...

Countries:United StatesPuerto Rico
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Frequently asked questions about Radiopaque Etonogestrel

What is Radiopaque Etonogestrel used for?

Radiopaque Etonogestrel is an investigational small molecule contraceptive implant being developed for contraception. It is designed to provide long-term birth control and is currently in Phase 3 clinical development. The drug has completed two Phase 3 trials, but it is not yet approved and remains under investigation.

Who makes Radiopaque Etonogestrel?

Radiopaque Etonogestrel is being developed by Organon & Co., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol OGN. Organon is conducting the clinical development program for this contraceptive implant, which is currently in Phase 3 trials.

What phase is Radiopaque Etonogestrel in?

Radiopaque Etonogestrel is in Phase 3 clinical development for contraception. Two Phase 3 trials have been completed, with a total enrollment of 799 participants. The drug is investigational and has not received FDA approval, as it is still undergoing clinical evaluation.

What clinical trials is Radiopaque Etonogestrel in?

Radiopaque Etonogestrel has completed two Phase 3 trials. NCT00620035 evaluated insertion characteristics of the implant using a next-generation applicator with 301 participants. NCT04626596 assessed contraceptive efficacy and safety beyond 3 years of use with 498 participants. Both trials are completed.

Is Radiopaque Etonogestrel the same as Etonogestrel?

Radiopaque Etonogestrel is a formulation of etonogestrel, a progestin used in contraceptive implants. The radiopaque version is designed to be visible on imaging, which may aid in insertion and removal. It is being developed by Organon & Co. and is currently in Phase 3 clinical trials.