# Study Comparing Emergency Contraception Effectiveness in Women Who Weight ≥ 80 kg

> **NCT03537768** · PHASE4 · TERMINATED · sponsor: **Kimberly Myer** · enrollment: 532 (actual)

## Conditions studied

- Contraception

## Interventions

- **DRUG:** Ulipristal Acetate
- **DRUG:** Levonorgestrel
- **DRUG:** Levonorgestrel

## Key facts

- **NCT ID:** NCT03537768
- **Lead sponsor:** Kimberly Myer
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2018-07-12
- **Primary completion:** 2022-04-20
- **Final completion:** 2022-04-20
- **Target enrollment:** 532 (ACTUAL)
- **Why stopped:** We weren't seeing as many pregnancies we initially thought.
- **Last updated:** 2025-11-20

## Collaborators

- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03537768

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03537768, "Study Comparing Emergency Contraception Effectiveness in Women Who Weight ≥ 80 kg". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT03537768. Licensed CC0.

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