Fetal 3D Study (Fetal Body Composition and Volumes Study)
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|ClinicalTrials.gov Identifier: NCT03266198|
Recruitment Status : Active, not recruiting
First Posted : August 30, 2017
Last Update Posted : March 13, 2019
|Condition or disease||Intervention/treatment|
|Fetal Growth Restriction Fetal Growth Abnormality||Other: No intervention|
The NICHD Fetal Growth Study was a multi-site, prospective cohort study designed to establish a standard for normal fetal growth (velocity) and size for gestational age in the U.S. population. For the singleton study, 2,334 low-risk, non-obese gravidas were recruited from each of 4 self-identified race/ethnicity backgrounds. An additional 468 obese women and 171 dichorionic twin gestations were recruited. After an initial sonogram in the first trimester, women were randomized to serial ultrasonology schedules. Each schedule comprised five additional sonograms for fetal biometry (six in twins) plus additional image and 3D volume acquisition for later analysis.
Ultrasound measurements at each follow-up visit included standard fetal biometrics ((BPD, HC, AC, FL) and the following volumes in the singleton study if they were able to be obtained: 1st trimester: fetus and gestational sac; 2nd and 3rd trimesters: head, cerebellum, face, chest, heart, abdomen, pelvis, arm and thigh. In twins, the volumes collected were 1st trimester: fetus and gestational sac and in the 2nd and 3rd trimesters the thigh. In addition to ultrasound, this study recorded maternal anthropometrics and a brief interview to capture changes in health status, stress and depression, and physical activity at each follow-up visit. Blood draws at baseline and at targeted gestational ages were obtained for the eventual identification of biomarkers indicative of fetal growth were collected. After delivery, neonatal anthropometric measures were assessed, placental biospecimens were collected, and select information about the obstetrical course and newborn status were abstracted from medical charts.
The Fetal 3D Study is being conducted to catalog and perform 2 Dimensional (2D) and 3 Dimensional (3D) measurement of the obstetrical ultrasound images in the existing bank of singleton and twin gestations collected from the NICHD Fetal Growth Studies. The research study aims to understand the relationship between gravid diseases and longitudinal changes in fetal body composition (subcutaneous fat, lean mass) and organ measurements (in singletons) over the course of pregnancy.
|Study Type :||Observational|
|Estimated Enrollment :||2973 participants|
|Official Title:||Fetal Body Composition and Volumes Study|
|Actual Study Start Date :||April 27, 2016|
|Estimated Primary Completion Date :||July 15, 2019|
|Estimated Study Completion Date :||July 15, 2019|
- Other: No intervention
- Standards for fetal body composition and organ volumes by maternal race/ethnicity [ Time Frame: 3 years ]
Growth trajectories in singletons and dichorionic twin pregnancies will be created using two- and selected three-dimensional ultrasound measures. Measures in singletons include fetal body composition from 2D abdominal circumference, arm and thigh volumes; cerebellum; adrenal glands; kidneys; liver; pancreas; lungs; first trimester gestational sac, embryo and placenta, using standardized protocols. Measures in twins include 2D abdominal circumference and thigh volumes, and first trimester gestational sac, embryo and placenta.
Measurements will be performed using stored ultrasound images and 3D volumes that were collected in the NICHD Fetal Growth Studies - Singleton and Twins ClinicalTrials.gov Identifier: NCT00912132 and NCT01369940, respectively. Women were recruited during the first trimester and followed until delivery. Each woman had scheduled ultrasound examinations, one at enrollment and five during follow-up visits (six for twins).
- Comparison of fetal 2D and 3D in pregnancies with complications with fetuses in the singleton standard [ Time Frame: 3 years ]The study will assess the relationship between gravid diseases and longitudinal changes in fetal body composition (subcutaneous fat and lean body mass) and organ volumes, and compare to those fetuses growing under optimal circumstances (i.e., singleton gestations included in the development of the fetal growth standard.
- Investigation of organ volumes (and ratios to fetal weight) and mass (fat) size in association with gravid or neonatal complications, such as kidney to fetal weight in fetal growth restriction, and liver to fetal weight in diabetes, by race/ethnicity [ Time Frame: 3 years ]
- Exploration of factors that influence these associations [ Time Frame: 3 years ]The study will determine whether potentially modifiable factors including maternal BMI, weight gain, longitudinal changes in maternal body composition, and nutrition and lifestyle factors modifies the relationship between longitudinal changes in fetal body composition (subcutaneous fat and lean body mass) and organ volumes and gravid diseases, and whether they vary by plurality (singleton or twin).
- Biomarkers in relation to fetal body composition and 3D volumes [ Time Frame: 3 years ]Longitudinal data will compare singleton and twin gestations with respect to maternal biomarkers of fetal growth, well-being and maternal nutritional status using banked biospecimens to determine if the biomarkers ranges established for singletons are applicable to twin gestations.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03266198
|United States, Texas|
|Baylor College of Medicine|
|Houston, Texas, United States|