# Progesterone as Luteal Support in Frozen IVF Natural Cycles

> **NCT04725864** · PHASE4 · UNKNOWN · sponsor: **Vastra Gotaland Region** · enrollment: 1800 (estimated)

## Conditions studied

- Infertility
- Embryo Transfer

## Interventions

- **DRUG:** Progesterone vaginal tablet

## Key facts

- **NCT ID:** NCT04725864
- **Lead sponsor:** Vastra Gotaland Region
- **Sponsor class:** OTHER_GOV
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-05-01
- **Primary completion:** 2025-06-30
- **Final completion:** 2025-12-31
- **Target enrollment:** 1800 (ESTIMATED)
- **Last updated:** 2024-04-24

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04725864

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04725864, "Progesterone as Luteal Support in Frozen IVF Natural Cycles". Retrieved via AI Analytics 2026-05-29 from https://api.ai-analytics.org/clinical/NCT04725864. Licensed CC0.

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