Clinical trials: Monochorionic Twins
Placenta, Monochorionic Twins
Placental Characteristics Within Monochorionic Twin Pregnancies
This prospective study aims to collate a comprehensive database of all main monochorionic twin groups to enable comparisons to be made within each twin group and additionally between each group with regards to several placental…
- Conditions
- Placenta, Monochorionic Twins, Anatomy
- Trial name
- NCT07124312
- Where
- United Kingdom
- Volunteers
- 65 people, healthy volunteers welcome
- Sponsor
- Birmingham Women's NHS Foundation Trust
Monochorionic Twins
Unequal Placental Sharing in Monochorionic Diamniotic Twins: an Observational Study
This is an observational study in 3 cohorts of monochorionic diamniotic (MCDA) twins. The aim of the study is to assess whether unequal placental sharing can be predicted in pregnancy and whether it is predictive of pregnancy…
- Trial name
- TWINSHARE (NCT03024918)
- Where
- Belgium
- Volunteers
- 393 people
- Sponsor
- Universitaire Ziekenhuizen KU Leuven
Twin Reversal Arterial Perfusion Syndrome
TRAP Intervention STudy: Early Versus Late Intervention for Twin Reversed Arterial Perfusion Sequence
Multi-center open-label randomized controlled trial to assess if early intervention (12.0-14.0 weeks) (study group) improves the outcome of TRAP sequence as compared to late intervention (16.0-19.0 weeks) (control group).
- Trial name
- TRAPIST (NCT02621645)
- Testing
- Early selective reduction of TRAP mass, Late selective reduction of TRAP mass, Ultrasound-guided intrafetal ablation using a 18 to 20 Gauge needle
- Where
- 14 sites in United States, Austria and 9 more
- Volunteers
- 126 people
- Sponsor
- Universitaire Ziekenhuizen KU Leuven
Twin; Pregnancy, Affecting Fetus or Newborn, Fetal Growth Retardation
Selective Fetal Growth Restriction in Monochorionic Twins - an International Investigation
Optimal diagnostic management and underlying pathophysiological mechanisms of selective fetal growth restriction (sFGR) in monochorionic diamniotic (MCDA) twin pregnancies have not been fully clarified.
- Conditions
- Twin; Pregnancy, Affecting Fetus or Newborn, Fetal Growth Retardation, Twin Monochorionic Diamniotic Placenta, Twin Diseases
- Trial name
- CONTRAST (NCT05952583)
- Testing
- Ultrasound
- Where
- 6 sites in United States, Belgium and 4 more
- Volunteers
- 274 people
- Sponsor
- Leiden University Medical Center
Normal Pregnancy
Maternal and Umbilical Cord Hormone Concentrations in Twin and Singleton Pregnancies
This study will examine levels of hormones, such as estrogen and testosterone, in maternal and umbilical cord blood to compare hormones between mothers who are having twins and mothers who are having one baby.
- Trial name
- NCT00341263
- Where
- United States
- Volunteers
- 111 people
- Sponsor
- National Cancer Institute (NCI)
Monochorionic Diamniotic Placenta, Monochorial Monoamniotic Placenta
Database of Monochorionic Pregnancies
The purpose of this study is to collect and analyze data regarding natural history, indications for fetal interventions, and maternal and fetal/neonatal outcomes associated with complicated monochorionic twin pregnancy.
- Conditions
- Monochorionic Diamniotic Placenta, Monochorial Monoamniotic Placenta, Twin; Complicating Pregnancy, Twin to Twin Transfusion Syndrome
- Trial name
- NCT05543499
- Where
- United States
- Volunteers
- 1,200 people
- Sponsor
- University of Miami
Twin Pregnancy, Antepartum Condition or Complication, Twin to Twin Transfusion as Antepartum Condition
Multicenter Prospective Cohort Study of Twin Maternal-Child Dyads in China
Multicenter Prospective Cohort Study of Twin Maternal-Child Dyads in China (ChiTwiMC) is supported by National Key Research and Development Program of China - Reproductive Health and Women's and Children's Health Protection…
- Conditions
- Twin Pregnancy, Antepartum Condition or Complication, Twin to Twin Transfusion as Antepartum Condition, Pre-Term, Pre-Eclampsia
- Trial name
- ChiTwiMC (NCT06414655)
- Where
- 11 sites in China
- Volunteers
- 2,000 people, healthy volunteers welcome
- Sponsor
- Peking University Third Hospital
Twin Monochorionic Diamniotic Placenta
Safety and Efficacy of Fetoscopes Used in Fetoscopic Selective Laser Photocoagulation
The purpose of this study is to evaluate the safety and efficacy of the investigational fetoscopes used in patients undergoing fetoscopic selective laser photocoagulation for complicated monochorionic-diamniotic pregnancies.
- Trial name
- NCT06022510
- Testing
- Fetoscopy Sets for Anterior and Posterior Placentas
- Where
- United States
- Sponsor
- Michael A Belfort
Twin Dichorionic Diamniotic Placenta, Twin Monochorionic Monoamniotic Placenta
Austrian Registry on the Outcome of Monochorionic Pregnancies
About one third of twin pregnancies are resulting from a single fertilized oocyte. Two third of these monozygotic twins share a common placenta and are therefore called monochorionic.
- Conditions
- Twin Dichorionic Diamniotic Placenta, Twin Monochorionic Monoamniotic Placenta, Twin-To-Twin Transfusion Syndrome, Twin Pregnancy With Antenatal Problem
- Trial name
- MonoReg (NCT03171909)
- Where
- 13 sites in Austria
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Preterm Birth, Preterm Labor
Is the Vaginal Microbiome and Metabolome Associated With Spontaneous Preterm Birth (sPTB) in Multiple Pregnancies?
The aim of this study is to try and find links between the microscopic organisms (such as bacteria, yeasts and viruses) in the vagina, and twin pregnancies that deliver too early (preterm birth).
- Conditions
- Preterm Birth, Preterm Labor, Multiple; Pregnancy, Complicated, Twin Dichorionic Diamniotic Placenta
- Trial name
- SPRUCE (NCT06053697)
- Where
- United Kingdom
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- University of Liverpool
Monochorionic Diamniotic Placenta, Monochorial Monoamniotic Placenta
MoDi Twin Placental Imaging
Twin-twin transfusion syndrome (TTTS) can arise in monochorionic, diamniotic (MoDi), those identical twins arising from division of a single fertilized ovum at 4-8 days gestational age (GA) or monochorionic, monoamniotic (MoMo or…
- Conditions
- Monochorionic Diamniotic Placenta, Monochorial Monoamniotic Placenta, Monochorionic Twins, Ultrasound Doppler
- Trial name
- NCT07667647
- Testing
- Verasonics Vantage 256 Ultrasound
- Where
- United States
- Volunteers
- 10 people
- Sponsor
- Carilion Clinic
Twin Twin Transfusion Syndrome
Renal Artery Dopplers in Twin Twin Transfusion Syndrome
Twin-twin transfusion syndrome (TTTS) is a complication affecting 10-15% of monochorionic, diamniotic (MCDA) twin pregnancies. Unevenly distributed blood flow across a shared placental circulation results in a volume-restricted…
- Trial name
- NCT03449823
- Testing
- Doppler ultrasound of fetal renal artery
- Where
- United States
- Volunteers
- 24 people
- Sponsor
- Columbia University
Twin Placenta
A Study of the Placental Methylome of Dichorionic and Monochorionic Monozygotic Twin Pairs to Establish a Timeline of Epigenetic Programming
The timing of the moment of splitting is variable amongst twins and can be inferred from chorionicity, allowing a time-line of early environmental influences to be established.
- Trial name
- NCT05733065
- Testing
- saliva sample, questionnaire
- Where
- Belgium
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- University Hospital, Ghent
High Risk Pregnancy, Congenital Heart Disease
Fetal Electrophysiologic Abnormalities in High-Risk Pregnancies Associated With Fetal Demise
Each year world-wide, 2.5 million fetuses die unexpectedly in the last half of pregnancy, 25,000 in the United States, making fetal demise ten-times more common than Sudden Infant Death Syndrome.
- Conditions
- High Risk Pregnancy, Congenital Heart Disease, Fetal Hydrops, Twin Monochorionic Monoamniotic Placenta
- Trial name
- NCT03775954
- Testing
- Fetal Magnetocardiogram and Neonatal Electrocardiogram, Substudy only: Maternal/Infant Pharmacogenomic assessment postnatally
- Where
- 2 sites in United States
- Volunteers
- 30 people
- Sponsor
- Medical College of Wisconsin
Prenatal Disorder, Premature Birth
Develop a Multi-disciplinary Approach for a Personalized Prenatal Diagnostics and Care for Twin Pregnancies
Different screening modalities evaluation to develop algorithms to predict pregnancy complications in twin pregnancies, and evaluation of serologic response to BNT162b2 Pfeizer/BioNTech vaccination.
- Conditions
- Prenatal Disorder, Premature Birth, Twin Pregnancy With Antenatal Problem, Twin; Pregnancy, Affecting Fetus or Newborn
- Trial name
- PRETWINSCREN (NCT04595214)
- Testing
- TTTS cases are treated by intra-uterine laser for separation.
- Where
- 7 sites in Belgium, Canada and 4 more
- Volunteers
- 1,200 people, healthy volunteers welcome
- Sponsor
- Assaf-Harofeh Medical Center
Fetal Conditions, Maternal; Procedure
A Prospective Study on the Role of Karl Storz Curved and Straight Fetoscopes (11508AAK and 11506AAK) for Fetoscopic Intrauterine Procedures
In this research study, the investigators want to learn more about the role of new innovative surgical devices, the Karl Storz Curved and Straight Fetoscopes for in-utero surgery.
- Conditions
- Fetal Conditions, Maternal; Procedure, Pregnancy Related, Twin to Twin Transfusion Syndrome
- Trial name
- NCT06056635
- Testing
- Karl Storz Curved Scope, Karl Storz Straight Scope
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Boston Children's Hospital
Twin Pregnancy, Monochorionic, Pregnancy Followed
Ductus Venosus Doppler at 16 Weeks in Monochorial Pregnancy
Studies shows that the realization of the Ductus venosus Doppler may improve the screening of the twin-twin transfusion syndrome.
- Trial name
- DVSTT (NCT03579069)
- Testing
- Ductus venosus Doppler
- Where
- France
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- University Hospital, Montpellier
Twin to Twin Transfusion as Antepartum Condition, Monochorionic Diamniotic Placenta
Laser Photocoagulation of Communicating Vessels in Twin-to-Twin Transfusion Syndrome
The purpose of this study is to evaluate the use of diode laser photocoagulation of the communicating vessels in twin-to- twin transfusion syndrome (TTTS) with respect to maternal, fetal and neonatal outcomes.
- Trial name
- NCT05008744
- Testing
- Fetoscopic laser ablation
- Where
- 2 sites in United States
- Volunteers
- 2,000 people
- Sponsor
- Seattle Children's Hospital
Intrauterine Growth Retardation
Randomized Clinical Trial: Expectant Management vs Laser Treatment of Monochorionic Twins With Severe Selective Intrauterine Growth Retardation and Absent or Reverse Diastolic Flow in the Umbilical Artery
Intrauterine growth retardation (IUGR) occurs in approximately 3 to 10% of singleton pregnancies, in 9.1% of all twins and 9.9% of monochorionic twins.
- Trial name
- NCT01177553
- Testing
- selective laser photocoagulation of communicating vessels, Expected Management
- Where
- 2 sites in United States
- Volunteers
- 5 people, healthy volunteers welcome
- Sponsor
- University of South Florida
Premature Birth
The Trial of Pessary After Laser for TTTS
Placing a cervical pessary in severe twin-to-twin transfusion syndrome (TTTS) cases treated by fetoscopic laser coagulation (FLC) decreases the spontaneous preterm birth rate.
- Trial name
- PECEPLASER (NCT01334489)
- Testing
- Arabin Cervical Pessary
- Where
- 4 sites in Belgium, Germany and 1 more
- Volunteers
- 352 people
- Sponsor
- Hospital Universitari Vall d'Hebron Research Institute