Measuring Relaxin Levels During Different Endometrial Preparation for Frozen Embryo Transfer

Relaxin Measurement in Different Endometrial Preparation Approaches for Frozen Embryo Transfer

ART Fertility Clinics LLC · NCT06526520

This study is testing how different methods of preparing the uterus for frozen embryo transfer affect the levels of a hormone called Relaxin in women to see if it impacts pregnancy success.

Quick facts

Study typeObservational
Enrollment5 (estimated)
Ages18 Years to 35 Years
SexFemale
SponsorART Fertility Clinics LLC (other)
Locations1 site (Abu Dhabi, Abu Dhabi Emirate)
Trial IDNCT06526520 on ClinicalTrials.gov

What this trial studies

This study investigates the levels of Relaxin hormone in women undergoing different endometrial preparation methods for frozen embryo transfer (FET). It compares the natural proliferative phase approach, which monitors follicle growth and induces secretory transformation with progesterone, to hormonal replacement therapy (HRT) methods. The goal is to determine whether a functional corpus luteum, which produces Relaxin, is present in the natural approach, as this could impact pregnancy outcomes. The study aims to clarify the implications of these preparation methods on early pregnancy complications and overall success rates.

Who should consider this trial

Good fit: Ideal candidates for this study are women with regular menstrual cycles who are preparing for a frozen embryo transfer.

Not a fit: Patients with abnormal ovarian findings, recent hormone intake, or those desiring pregnancy may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved protocols for frozen embryo transfers, potentially reducing early pregnancy complications.

How similar studies have performed: While some studies have explored hormonal effects on embryo transfer, this specific approach comparing Relaxin levels in different preparation methods is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* regular menstrual cycles

Exclusion Criteria:

* abnormal findings of the ovaries (e.g endometriosis)
* Intake of any hormones within 3 months of study start
* desire to become pregnant

Where this trial is running

Abu Dhabi, Abu Dhabi Emirate

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Frozen Embryo Transfer, frozen embryo transfer, hormonal replacement cycle, natural cycle, Relaxin

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.