# IUI With Letrozole Versus in Natural Cycle

> **NCT04169451** · NA · RECRUITING · sponsor: **Peking University Third Hospital** · enrollment: 982 (estimated)

## Conditions studied

- Intrauterine Insemination
- Unexplained Infertility

## Interventions

- **DRUG:** Letrozole

## Key facts

- **NCT ID:** NCT04169451
- **Lead sponsor:** Peking University Third Hospital
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** RECRUITING
- **Start date:** 2022-09-29
- **Primary completion:** 2025-12
- **Final completion:** 2026-06
- **Target enrollment:** 982 (ESTIMATED)
- **Last updated:** 2024-02-07

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04169451

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04169451, "IUI With Letrozole Versus in Natural Cycle". Retrieved via AI Analytics 2026-06-01 from https://api.ai-analytics.org/clinical/NCT04169451. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*