Actively Recruiting

Phase Not Applicable
Age: 18Years - 40Years
FEMALE
NCT06304792

Immediate Versus Postponed Single Blastocyst Transfer in Programmed or Stimulated Cycle Frozen Embryo Transfer

Led by Rigshospitalet, Denmark · Updated on 2025-08-11

484

Participants Needed

1

Research Sites

234 weeks

Total Duration

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AI-Summary

What this Trial Is About

The aim of this randomized controlled trial is to examine whether single blastocyst transfer in the first cycle after oocyte retrieval (immediate) is non-inferior to single blastocyst transfer in a subsequent cycle (postponed) in stimulated or programmed cycle frozen embryo transfer (FET). The primary outcome is live birth rate.

CONDITIONS

Official Title

Immediate Versus Postponed Single Blastocyst Transfer in Programmed or Stimulated Cycle Frozen Embryo Transfer

Who Can Participate

Age: 18Years - 40Years
FEMALE

Eligibility Criteria

Eligible

You may qualify if you...

  • Eligible for frozen embryo transfer in a programmed or stimulated cycle immediately following fresh embryo transfer or freeze-all cycle
  • Oligo-anovulatory women with cycle length longer than 35 days
  • Ovulatory women with cycle length between 21 and 35 days
  • At least one vitrified day 5 or 6 blastocyst with Gardner score of 3BB or higher at vitrification
Not Eligible

You will not qualify if you...

  • Uterine malformation
  • Presence of hydrosalpinx, submucosal uterine myomas, or uterine polyps
  • Allergies or contraindications to standard fertility medication
  • Male or female HIV or Hepatitis B or C infection
  • Preimplantation genetic testing in the fresh cycle
  • Testicular sperm aspiration
  • Severe ovarian hyperstimulation syndrome with hospital admission and ascites drainage during fresh cycle
  • Oocyte donation

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Trial Site Locations

Total: 1 location

1

Fertility Departmen, Rigshospitalet

Copenhagen, Denmark, 2100

Actively Recruiting

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Research Team

A

Anja B Pinborg, Prof., DMSC

CONTACT

How is the study designed?

Study Type

INTERVENTIONAL

Masking

NONE

Allocation

RANDOMIZED

Model

PARALLEL

Primary Purpose

TREATMENT

Number of Arms

2

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