Clinical trial Recruiting at 1 site Interventional Ages 18 and up Women only

Evaluating uterine entry techniques for laser treatment in twin-to-twin transfusion syndrome

Official title: The Effect of Entry Technique on Chorioamniotic Membrane Separation in Fetoscopic Laser Photocoagulation for Twin-To-Twin Transfusion Syndrome

Run by Baylor College of Medicine · NCT06829901 · Data updated 2026-11-12

This study is testing whether different ways to enter the uterus for laser treatment can improve outcomes for pregnant women with twin-to-twin transfusion syndrome.

Quick facts

Study typeInterventional
Ages18 Years and up
SexWomen only
Enrollment216 (estimated)
SponsorBaylor College of Medicine
Academic / other
Locations1 site (Houston, Texas)
StatusRecruiting
StartedMarch 14, 2025
Main results expectedDecember 2029
Study endsDecember 2030
Registry record updatedMarch 4, 2026
Trial IDNCT06829901 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are patients with complicated monochorionic-diamniotic twin pregnancies diagnosed with twin-to-twin transfusion syndrome who opt for fetoscopic laser photocoagulation.

Probably not a fit

Patients who do not choose to undergo fetoscopic laser photocoagulation or those with triplet or higher order multiple gestations will not benefit from this study.

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

What this trial studies

This study aims to assess the impact of different uterine entry techniques on the outcomes of fetoscopic laser photocoagulation for twin-to-twin transfusion syndrome (TTTS). Patients at Texas Children's Fetal Center who choose to undergo this procedure will be invited to participate and will undergo a thorough informed consent process. Eligible participants will be randomly assigned to either a direct entry group or a Seldinger technique group for the procedure. The study will focus on the rates of chorioamniotic membrane separation as a primary outcome measure.

Why it matters

Potential benefit: If successful, this study could improve surgical outcomes and reduce complications for patients undergoing treatment for TTTS.

How similar studies have gone: While the approach of using different entry techniques is established, this specific comparison in the context of TTTS is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients who are eligible and elect to undergo fetoscopic selective laser photocoagulation for complicated monochorionic-diamniotic twin pregnancies with twin-to-twin transfusion syndrome.
* Patients will be between 16 0/7 weeks and 26 0/7 weeks gestational age.

Exclusion Criteria:

* Patients who do not elect to undergo fetoscopic laser photocoagulation for the treatment of complicated monochorionic-diamniotic twin pregnancies with twin-to-twin transfusion syndrome.
* Triplets and higher order multiple gestations.
* Patients who are less than 16 0/7 weeks or greater than 26 0/7 weeks gestational age.
* Patients with a short cervix (less than 1.5 cm).
* Patients with a known subchorionic hemorrhage.

Where it's running

  • Texas Children's Hospital - Pavilion for Women
    Houston, Texas, United States
    Recruiting

Study contacts

  • Principal investigator: Ahmed Nassr, MD, PhD — Baylor College of Medicine
  • Study coordinator: Ahmed Nassr, MD, PhD
  • Email: ahmed.nassr@bcm.edu
  • Phone: 832-826-7449

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Study of Twin Pregnancies and Their Outcomes in China

    This study is trying to understand the challenges and outcomes of twin pregnancies in China by following 2000 pregnant women and their babies from pregnancy through early childhood.

    Recruiting at 11 sites Peking University Third Hospital · Hefei, Anhui and 10 other locations · NCT06414655

  • Laser treatment for twin-to-twin transfusion syndrome

    This study is testing if a laser treatment can improve outcomes for pregnant women with twin-to-twin transfusion syndrome by targeting the blood vessels connecting their twins.

    Recruiting Seattle Children's Hospital · Seattle, Washington and 1 other locations · NCT05008744

  • Surgery to improve outcomes in Twin-Twin Transfusion Syndrome

    This study is testing if closing the hole in the amniotic membrane during surgery for Twin-Twin Transfusion Syndrome can lead to healthier pregnancies and better delivery outcomes.

    Recruiting Children's Hospital Medical Center, Cincinnati · Cincinnati, Ohio · NCT06991400

  • Evaluating new fetoscopes for in-utero surgery

    This study is testing two new types of fetoscopes to see which one works better for performing safe surgeries on unborn babies with certain health issues.

    Recruiting Boston Children's Hospital · Boston, Massachusetts · NCT06056635

  • Monitoring fetal heart activity in high-risk pregnancies to prevent stillbirth

    This study is testing a new way to monitor fetal heart activity in high-risk pregnancies to see if it can help prevent stillbirth.

    Recruiting at 2 sites Medical College of Wisconsin · Madison, Wisconsin and 1 other locations · NCT03775954

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.