MRI Assessment of Placental Health in Twin Pregnancies with IUGR

This observational study is looking at how the placenta works in pregnant mothers carrying twins, where one or both babies have Intrauterine Growth Restriction (IUGR), meaning they are smaller than expected. Researchers will use MRI scans to see how the placenta responds when the mother breathes extra oxygen for a short time. The goal is to understand how well the placenta is delivering oxygen to the babies, which could help doctors decide the best time for delivery to prevent stillbirth. You may be eligible if you are a pregnant woman between 18 and 45 years old with a twin pregnancy diagnosed with selective IUGR.

Study design
This is an observational study with a planned enrollment of 80 participants. It is not a randomized trial.
What's involved
You would receive oxygen for no more than 10 minutes during a 1-hour MRI scan. This administration would happen once per scan.
Compensation
Not stated in the trial record.
Follow-up
The study measures changes during the 1-hour scan, specifically at 5 minutes and 30 minutes. No longer-term follow-up is specified.

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NCT02297724

MRI Assessment of Placental Health

Recruiting
Not specifiedAges 18–45Observational
Boston Children's Hospital
~80 participants
Updated 2025-12-12 on ClinicalTrials.gov
What's tested:Oxygen

At a glance

Recruiting sites
2 of 2 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
BOLD MRI signal change during maternal oxygen exposure in placenta and fetus
Measured over 30 min during the 1 hour scan
+1 more outcome measured
Intrauterine Growth Restriction
2 sites across 2 states
Massachusetts1
Spain1
  • Patricia E Grant, MD · PRINCIPAL_INVESTIGATOR · Boston Children's Hospital

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Eligibility criteria

Inclusion

Proven monochorionicity / dichorionicity
Discordance in estimated fetal weight (EFW). Growth restriction (\<10 percentile of norm) in one or both fetus(es) AND/OR growth discordance (\> or = 20%) between twin fetuses. 2. The pregnant mother with singleton gestation with diagnosis of IUGR based upon obstetrical US findings as following:
Proven singleton gestation
Growth restriction of fetus (\<10 percentile of norm)
Doppler measurements that indicates placental insufficiency: umbilical artery, middle cerebral artery, uterine artery; or oligohydramnios. 3. Gestational age: Bigger than 18 weeks. 4. Pregnant mother is between age 18 to 45, clinically stable and can safely tolerate fetal MRI study.
  • BOLD MRI signal change during maternal oxygen exposure in placenta and fetus30 min during the 1 hour scan
  • placental volume on MRI image5 min during 1 hour scan