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Apr 11, 2026 14 min

Fetal AC> 90%: Diagnosis?

from Dr. Chapa’s OBGYN Clinical Pearls Hosted by Dr. Chapa’s Clinical Pearls

The diagnosis of fetal growth restriction can be made with an isolated abdominal circumference less than the 90th percentile. So is the opposite true? Does a fetal abdominal circumference (isolated) of greater than 90% qualify for “LGA” fetus? In this episode we're going to explain why, although it is logically correct, it is diagnostically incorrect. An isolated abdominal circumference on ultrasound of greater than 90% is however a strong predictive risk factor for one delivery finding. Listen in for details. 1. Macrosomia: ACOG Practice Bulletin, Number 216. Obstetrics and Gynecology. 2020 2. Canavan TP, Hill LM.. Sonographic Biometry in the Early Third Trimester: A Comparison of Parameters to Predict Macrosomia at Birth. Journal of Clinical Ultrasound : JCU. 2015. 3. Culliney KA, Parry GK, Brown J, Crowther CA. Regimens of Fetal Surveillance of Suspected Large-for-Gestational-Age Fetuses for Improving Health Outcomes.The Cochrane Database of Systematic Reviews. 2016.

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This episode was published on April 11, 2026.

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