# FET-LET-2x2: Clinical Pregnancy Rates After Frozen Embryo Transfer in Natural and Modified Natural Cycles

> **NCT07425990** · NA · NOT_YET_RECRUITING · sponsor: **University of Novi Sad** · enrollment: 120 (estimated)

## Conditions studied

- Infertility Female
- Frozen Embryo Transfer (FET)

## Interventions

- **DRUG:** Letrozole (Aromatase Inhibitors)
- **DRUG:** Choriogonadotropin alpha (r-hCG)
- **DRUG:** Progesterone

## Key facts

- **NCT ID:** NCT07425990
- **Lead sponsor:** University of Novi Sad
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** NOT_YET_RECRUITING
- **Start date:** 2026-02
- **Primary completion:** 2027-02
- **Final completion:** 2027-03
- **Target enrollment:** 120 (ESTIMATED)
- **Last updated:** 2026-02-23


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT07425990

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT07425990, "FET-LET-2x2: Clinical Pregnancy Rates After Frozen Embryo Transfer in Natural and Modified Natural Cycles". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT07425990. Licensed CC0.

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