Traditional methods for estimating fetal weight (EFW) often miss the mark because they focus on bone and circumference while ignoring fetal fat. This study proposes a more inclusive formula to fix that. Current models (using BPD, HC, AC, and FL) are the standard but suffer from high observer variability. These formulas struggle at the extremes (macrosomia or growth restriction) and fail to account for fetal adiposity, which makes up 10-12% of a newborn's mass. The study introduces a novel formula that moves beyond simple bone measurements by integrating Soft Tissue Thickness (STT). By accounting for a broader range of biological variants and fat distribution, this new model aims to provide a non-inferior, more precise predictive value for fetal weight compared to traditional methods.
Singleton Gestation.
Gestational Age: Participants must be at a term ≥ 37 weeks
Timing of Examination: Sonographic EFW must be performed within 48 -72 hours prior to delivery.
Welling to share in the study.
Fetal Anomalies.
Amniotic Fluid Disorders: oligohydramnios or polyhydramnios
Maternal morbid obesity (BMI > 40 kg/m2)
Maternal medical disorders: as diabetes, hypertension, systemic lupus erythromatosis or others affecting fetal growth
full term pregnant women within 48-72 hours before delivery
Cohort
Cross-sectional
3rd trimester ultrasound examination within 48-72 hours of delivery
Other interventionultrasound examination of full-term pregnant women with 48-72 hours of delivery measuring Abdominal circumference, fetal abdominal subcutaneous soft tissue thickness, femur length and mid-thigh soft tissue thickness.
development and validation of novel method for fetal weight estimation
a novel module for fetal weight estimation depending on abdominal circumference, fetal abdominal subcutaneous soft tissue thickness, femur length, mid-thigh soft tissue thickness.
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