//fpnotebook.com/
Fetal Abdominal Circumference
Aka: Fetal Abdominal Circumference
- Technique
- Use ellipse
- Transverse abdominal Triad
- Deep portion of Portal Vein (J Sign)
- Spine
- Stomach


- Equation
- Abdominal Circumference = (AP + Transverse) x 1.57
- Accuracy
- Least accurate of measurements for estimating Gestational age (except 26-32 weeks)
- Most useful beyond 15 weeks for calculating fetal weight, serial growth and diagnosing IUGR
- References
- Benson (1991) AJR Am J Roentgenol 157(6):1275-7 [PubMed]
- Resources
- AJR Online version of Benson and Doubilet article above
- http://www.ajronline.org/doi/pdf/10.2214/ajr.157.6.1950881