fetal biometry
Ultrasonic measurement of fetal anatomical structures to assess gestational age, growth, and development.
Full Definition
Fetal biometry refers to the systematic ultrasonic measurement of specific fetal anatomical structures to determine gestational age, monitor fetal growth, and detect developmental abnormalities. Standard biometric parameters include biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL). These measurements are plotted against established growth charts and used to calculate estimated fetal weight (EFW) and percentiles. Biometric assessments are performed at routine intervals throughout pregnancy and are essential for diagnosing intrauterine growth restriction, macrosomia, and other growth disorders. Accuracy depends on proper technique, fetal position, and gestational age.
In Context
- "Fetal biometry at 20 weeks showed all measurements appropriate for gestational age." — Ultrasound report
- "Third-trimester fetal biometry revealed estimated fetal weight in the 95th percentile." — Growth assessment