摘要
Femur length (FL) is one of the three key biometric parameters routinely measured via ultrasound during prenatal visits to determine fetal gestational age and growth. A short FL is generally defined as a value that is two standard deviations below the mean FL for a particular gestational age. The etiology of short FL includes skeletal dysplasias, aneuploidies, and intrauterine growth restriction. We present a case of a pregnant patient with isolated short FL of fetus on third trimester ultrasound exam.