Prospective Controlled Cohort Study on the Safety of a Monophasic Oral Contraceptive Containing Nomegestrol Acetate (2.5mg) and 17ß-estradiol (1.5mg) (PRO-E2)
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ClinicalTrials.gov Identifier: NCT01650168 |
Recruitment Status :
Active, not recruiting
First Posted : July 26, 2012
Last Update Posted : October 8, 2020
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Condition or disease |
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Contraception |
NOMAC-E2 is a novel monophasic oral contraceptive containing a fixed dose of nomegestrol acetate (2.5mg) and 17ß-estradiol (1.5mg) which is taken for 24 days followed by 4 days of placebo. The most relevant adverse clinical outcome that has been linked to the use of COCs is venous thromboembolism (VTE). Data from randomized clinical trials did not show any serious health concerns for NOMAC-E2. However, the statistical power to detect rare adverse events is limited in these studies.
PRO-E2 is a large, prospective, controlled, long-term active surveillance study to investigate the safety of NOMAC-E2 with regard to the outcomes of interest. This study follows the European Active Surveillance (EURAS) design methodology with some modifications due to country- and product-specific characteristics. The outcomes of interest will be validated via the attending physicians. A multi-faceted follow-up procedure will ensure a low loss to follow-up rate. This study will involve women from Europe and Australia who will be followed for up to 2 years. Data analysis will include multivariable techniques such as Cox regression.
Study Type : | Observational |
Estimated Enrollment : | 101000 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | Prospective Controlled Cohort Study on the Safety of a Monophasic Oral Contraceptive Containing Nomegestrol Acetate (2.5mg) and 17ß-estradiol (1.5mg) |
Study Start Date : | July 2012 |
Estimated Primary Completion Date : | December 2020 |
Estimated Study Completion Date : | December 2020 |
Group/Cohort |
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NOMAC-E2
New users of NOMAC-E2
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LNG-COCs
New users of levonorgestrel-containing COCs
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- Venous thromboembolisms (VTE) [ Time Frame: Within 2 years ]
- Arterial thromboembolisms (ATE) [ Time Frame: Within 2 years ]
- Depressive disorders [ Time Frame: Within 2 years ]
- Cholelithiasis [ Time Frame: Within 2 years ]
- Inflammatory bowel disease [ Time Frame: Within 2 years ]
- Short- and long-term fertility [ Time Frame: Within 2 years ]
- Drug utilization pattern [ Time Frame: Within 2 years ]
- Pregnancy outcomes [ Time Frame: Within 2 years ]
- Weight change [ Time Frame: Within 2 years ]
- General hepatobiliary disorders [ Time Frame: Within 2 years ]
- Acne [ Time Frame: Within 2 years ]

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Ages Eligible for Study: | Child, Adult, Older Adult |
Sexes Eligible for Study: | Female |
Accepts Healthy Volunteers: | Yes |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- First ever user of a COC ("starter")
- User who restarts hormonal contraceptive use with a COC (same COC as before or a new COC) after an intake break of at least two months ("restarters")
- Women willing to participate in the active surveillance
Exclusion Criteria:
- Women who do not understand the major aspects of the study

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01650168
Germany | |
Center for Epidemiology and Health Research Berlin | |
Berlin, Germany |
Principal Investigator: | Klaas Heinemann, MD, PhD | Center for Epidemiology and Health Research, Berlin, Germany |
Responsible Party: | Center for Epidemiology and Health Research, Germany |
ClinicalTrials.gov Identifier: | NCT01650168 |
Other Study ID Numbers: |
ZEG2013_08 |
First Posted: | July 26, 2012 Key Record Dates |
Last Update Posted: | October 8, 2020 |
Last Verified: | October 2020 |
NOMAC-E2 Nomegestrol acetate Estradiol Levonorgestrel Safety |