Clinical trial Recruiting at 2 sites Observational Ages 18 to 42 Women only

Follicular Flushing During Abdominal Egg Retrieval in Women with Low Egg Reserve

Official title: Follicular Flushing Versus Direct Aspiration in Transabdominal Oocyte Retrieval

Run by Centrum Clinic IVF Center · NCT07877025 · Data updated 2026-11-12

This study tests whether rinsing the egg sacs during abdominal egg collection yields more eggs and more mature eggs for freezing in women with low ovarian reserve.

Quick facts

Study typeObservational
Ages18 Years to 42 Years
SexWomen only
Enrollment180 (estimated)
SponsorCentrum Clinic IVF Center
Academic / other
Locations2 sites (Ankara, Ankara and 1 other locations)
StatusRecruiting
StartedAugust 20, 2026
Main results expectedDecember 20, 2026
Study endsDecember 30, 2026
Registry record updatedOctober 20, 2026
Trial IDNCT07877025 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Unmarried women aged 18-42 with AMH ≤1.0 ng/mL who are opting for fertility preservation via transabdominal oocyte retrieval.

Probably not a fit

Women not experiencing improved egg yield with flushing or those with ovarian factors limiting retrieval may not benefit from this approach.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational, two-centre study compares two abdominal oocyte retrieval techniques in women who have decided to freeze their eggs and have AMH ≤1.0 ng/mL. Centre A uses direct aspiration only, while Centre B uses systematic follicular flushing with a double-channel needle and multiple rinses if needed. The aim is to see if flushing increases the total number of eggs retrieved and the number of mature eggs suitable for freezing. All procedures are performed by experienced operators under standard stimulation protocols, and enrollment follows Turkish regulatory guidelines for oocyte cryopreservation.

Why it matters

Potential benefit: If flushing proves beneficial, it could improve egg yield and freezing potential for women with diminished ovarian reserve undergoing transabdominal retrieval.

How similar studies have gone: Previous randomized trials in transvaginal IVF have not shown a clear benefit from flushing; this study explores flushing specifically in transabdominal retrieval for poor responders, a relatively underexplored area.

Who can join: the full rules

Show full inclusion / exclusion criteria
IEligibility Criteria

Inclusion Criteria:

* Women aged 18-42 years
* Serum anti-Müllerian hormone (AMH) ≤1.0 ng/mL
* Planned oocyte cryopreservation for fertility preservation
* Decline of transvaginal oocyte retrieval for cultural or personal reasons, with transabdominal retrieval chosen as the preferred route
* Eligible for oocyte cryopreservation under Turkish regulations
* At least one follicle ≥17 mm on the day of ovulation trigger
* Written informed consent

Exclusion Criteria:

* Conditions that prevent safe transabdominal access, such as extensive pelvic adhesions or unfavourable ovarian position
* Previous major abdominal or pelvic surgery likely to interfere with the procedure
* Active pelvic infection
* Suspected ovarian malignancy
* Contraindications to sedation or oocyte retrieval
* Retrieval performed outside local regulatory requirements
* Incomplete clinical or laboratory data

Where it's running

  • Centrum Clinic IVF Center
    Ankara, Ankara, Turkey (Türkiye)
    Recruiting
  • Brussels IVF Center
    Istanbul, Istanbul, Turkey (Türkiye)
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.