# Prevention of Preterm Birth in Pregnant Women at Risk Identified by Ultrasound: Evaluation of Two Treatment Strategies

> **NCT01643980** · PHASE4 · COMPLETED · sponsor: **Dra.Cristina Martinez Payo** · enrollment: 254 (actual)

## Conditions studied

- Early Onset of Delivery Before 37 Weeks

## Interventions

- **DRUG:** Vaginal micronized progesterone
- **DEVICE:** Cervical pessary

## Key facts

- **NCT ID:** NCT01643980
- **Lead sponsor:** Dra.Cristina Martinez Payo
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2012-08
- **Primary completion:** 2016-03
- **Final completion:** 2016-04
- **Target enrollment:** 254 (ACTUAL)
- **Last updated:** 2016-10-17


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01643980

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01643980, "Prevention of Preterm Birth in Pregnant Women at Risk Identified by Ultrasound: Evaluation of Two Treatment Strategies". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT01643980. Licensed CC0.

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