# A Randomized Trial Comparing the Live Birth Rate of Immediate Versus Delayed FET Following a Freeze-all Strategy

> **NCT04371783** · NA · ACTIVE_NOT_RECRUITING · sponsor: **ShangHai Ji Ai Genetics & IVF Institute** · enrollment: 828 (estimated)

## Conditions studied

- IVF
- Frozen Embryo Transfer

## Interventions

- **PROCEDURE:** Immediate FET
- **PROCEDURE:** Delayed FET

## Key facts

- **NCT ID:** NCT04371783
- **Lead sponsor:** ShangHai Ji Ai Genetics & IVF Institute
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2020-05-04
- **Primary completion:** 2026-06-01
- **Final completion:** 2026-06-30
- **Target enrollment:** 828 (ESTIMATED)
- **Last updated:** 2026-02-02


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04371783

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04371783, "A Randomized Trial Comparing the Live Birth Rate of Immediate Versus Delayed FET Following a Freeze-all Strategy". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT04371783. Licensed CC0.

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