Birth Weight, Fetal Growth Retardation, Fetal Macrosomia, Fetal Weight
Conditions
Brief summary
This trial is a collaborative study between 4 sites worldwide. A total of 600 research subjects will be enrolled. We will investigate the validity of using 5D Limb Volume software to improve on estimated fetal weight predictions over a broad range of gestational ages. The purpose is to compare the accuracy and precision of birth weight predictions based on this new technology as compared to the current 2D birth weight prediction models.
Detailed description
Ultrasound has been used for over 20 years to estimate fetal weight prior to birth. Sometimes this estimation is not always similar to what the baby actually weighs. In addition to the regular measurements taken at routine ultrasound exams, 3D ultrasound of the baby's arm and leg soft tissue may give us more precise information on how much the baby weighs. This measurement is called fractional limb volume. Fractional limb volume (FLV) is a soft tissue measurement of the arm or thigh that can be used to evaluate body composition. This measurement mostly reflects the fat and muscle development with a small amount of bone. The recent introduction of 5D Limb Volume software (Samsung, Seoul, Korea) now makes it possible to efficiently and reproducibly measure semi-automated FLV using a computer guided technique. Subjects will receive one ultrasound scan 4-7 days before their delivery. Both 2D and 3D measurements will be taken. These measurements will then be used to estimate fetal weight. We will compare estimated weight to actual birth weight in order to determine the accuracy and precision of the 5D Limb Volume technology. This data may also be used to develop new weight estimation models that could provide better accuracy and/or precision than what is currently provided using published methods.
Interventions
OTHERUltrasound Examination
Research volunteers will be invited to have a 2D/3D ultrasound research scan 4-7 days from delivery.This ultrasound scan will take approximately 30 minutes to complete.
Sponsors
Samsung Medison Co., Ltd.
Beijing Obstetrics and Gynecology Hospital
Frauenklinik der Diakonischen Dienste Hannover
University of Pittsburgh
Baylor College of Medicine
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
FEMALE
Age
18 Years to 64 Years
Healthy volunteers
No
Inclusion criteria
1. Pregnant women (28-42 weeks) within 4-7 days of delivery 2. Planned delivery at the collaborating hospital where the fetal US scan was performed 3. Body mass index at first official prenatal appointment below 35.0 kg/M2 4. Firm US dating criteria (early crown-rump length \< 14 weeks gestational age)
Exclusion criteria
1. Presence of technical factors (e.g. obesity) that make it difficult to visualize fetal structures 2. Oligohydramnios determined by amniotic fluid index less than 5cm 3. Fetal distress or unstable maternal condition 4. Structural or chromosomal fetal anomalies
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Comparison Between 5D Limb Vol and 2D Birth weight Prediction | Feb 2017 -Feb 2018 | Compare the accuracy and precision of BW predictions based on 5D Limb Vol technology in pregnant women as compared to 2D BW prediction models |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Birth weight Predictions in Suspected Growth Abnormalities | Feb 2017 - Feb 2018 | Characterize the performance of BW predictions based on 5D Limb Vol technology in pregnant women with suspected growth abnormalities. |
Outcome results
None listed