# The Effects of Two Endometrium Preparation Protocols in Frozen-thawed Embryo Transfer in Women With Irregular Cycles

> **NCT01780610** · NA · UNKNOWN · sponsor: **Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University** · enrollment: 670 (estimated)

## Conditions studied

- Infertility

## Interventions

- **DRUG:** Letrozole and human chorionic gonadotrophin
- **DRUG:** estradiol and progesterone

## Key facts

- **NCT ID:** NCT01780610
- **Lead sponsor:** Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2012-01
- **Primary completion:** 2015-01
- **Final completion:** 2015-01
- **Target enrollment:** 670 (ESTIMATED)
- **Last updated:** 2013-04-02


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01780610

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01780610, "The Effects of Two Endometrium Preparation Protocols in Frozen-thawed Embryo Transfer in Women With Irregular Cycles". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT01780610. Licensed CC0.

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