The use of a routine late third-trimester ultrasound-based protocol in well-selected low-risk pregnancies significantly increases the detection rate of small-forgestational-age (SGA) neonates compared with a selective symphysis-fundus height measurement-based approach. What are the clinical implications of this work?Considering the association between stillbirth and undetected fetal growth abnormalities, especially in underserved areas, we recommend routine third-trimester ultrasound in low-risk pregnancies to detect SGA. This justifies the routine use of ultrasound for fetal growth monitoring between 36 + 0 and 37 + 6 weeks.