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FET Protocols for Infertility (PREFER Trial)

N/A
Recruiting
Led By Emre U Seli, MD
Research Sponsored by Reproductive Medicine Associates of New Jersey
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Patients who have previously undergone their first unsuccessful frozen embryo transfer cycle, defined as either failure of implantation with negative pregnancy test or biochemical pregnancy, using a programmed cycle protocol
Patients ages 18 to 53 years old as per practice guidelines
Timeline
Screening 3 weeks
Treatment Varies
Follow Up approximately 1-2 months post initial bhcg
Awards & highlights

PREFER Trial Summary

This trial will compare different frozen embryo transfer protocols to see if they improve pregnancy rates after a failed first FET cycle in infertility patients.

Who is the study for?
This trial is for women aged 18-53 with a BMI of 16-45 kg/m2 who have had one unsuccessful frozen embryo transfer (FET) using a programmed cycle. They must have at least one euploid blastocyst left, regular menstrual cycles or detectable LH surge, and an endometrial thickness ≥7 mm from the last cycle.Check my eligibility
What is being tested?
The study compares two FET protocols in patients needing a second attempt after an initial failure. Participants will be randomly assigned to either repeat the programmed protocol or switch to a modified natural protocol, assessing pregnancy outcomes and uterine flexibility.See study design
What are the potential side effects?
While specific side effects are not detailed for this trial, common risks may include discomfort from transvaginal ultrasounds and potential emotional distress due to varying success rates of embryo implantation.

PREFER Trial Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
Select...
My first frozen embryo transfer did not result in a successful pregnancy.
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I am between 18 and 53 years old.

PREFER Trial Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~approximately 1-2 months post initial bhcg
This trial's timeline: 3 weeks for screening, Varies for treatment, and approximately 1-2 months post initial bhcg for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Sustained implantation rate
Secondary outcome measures
Biochemical Pregnancy Rate
Biochemical pregnancy loss rate
Clinical Pregnancy Loss Rate
+6 more

PREFER Trial Design

2Treatment groups
Experimental Treatment
Group I: Programmed FET ProtocolExperimental Treatment1 Intervention
Patients in this arm of the study will proceed with another programmed FET protocol which involves taking exogenous estrogen by mouth to stimulate the uterine lining to grow and develop. Once the lining has reached ≥ 7 mm and an endometrial pattern of type 1 or type 2, intramuscular progesterone in oil (50mg/ml daily) will be started at 8am on the morning that progesterone is initiated and continued per routine.
Group II: Modified Natural FET ProtocolExperimental Treatment1 Intervention
Following development of at least one dominant follicle and endometrial proliferation ≥ 7 mm during cycle monitoring, patient will undergo administration of human chorionic gonadotropin (hCG) trigger shot followed by initiation of vaginal progesterone administration in accordance with institutional protocols.

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Who is running the clinical trial?

Reproductive Medicine Associates of New JerseyLead Sponsor
52 Previous Clinical Trials
37,054 Total Patients Enrolled
Emre U Seli, MDPrincipal InvestigatorReproductive Medicine Associates of New Jersey
1 Previous Clinical Trials
90 Total Patients Enrolled

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Who is eligible to join the trial cohort?

"To qualify for this medical study, women aged 18 to 53 who experience infertility must apply. 760 participants are currently being sought after."

Answered by AI

Are there still openings available in this clinical experiment?

"The information available on clinicaltrials.gov does not indicate that this particular trial is actively searching for participants at the moment, as it was last updated on October 5th 2023. Despite this, there are still 259 other studies presently accepting patients into their program."

Answered by AI

Does this research encompass individuals who are over two decades old?

"This clinical trial necessitates that applicants be between 18 and 53 years old. For those below the age of consent or above retirement, there are 17 studies for minors and 38 for seniors, respectively."

Answered by AI

Who else is applying?

What site did they apply to?
Reproductive Medicine Associates of New Jersey
What portion of applicants met pre-screening criteria?
Did not meet criteria
~520 spots leftby Dec 2025