# International Active Surveillance Study: Safety of Estrogen Estetrol (E4) Contraceptive Study (INAS-SEECS)

> **NCT06186271** · — · RECRUITING · sponsor: **Center for Epidemiology and Health Research, Germany** · enrollment: 68100 (estimated)

## Conditions studied

- Contraception

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT06186271
- **Lead sponsor:** Center for Epidemiology and Health Research, Germany
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2025-04-24
- **Primary completion:** 2028-12
- **Final completion:** 2029-06
- **Target enrollment:** 68100 (ESTIMATED)
- **Last updated:** 2025-08-20

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT06186271

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT06186271, "International Active Surveillance Study: Safety of Estrogen Estetrol (E4) Contraceptive Study (INAS-SEECS)". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT06186271. Licensed CC0.

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