Fetal yawning

Abstract

Incidental fetal yawning movements can rarely be observed during real‐time ultrasonographic examination. In this report we document repetitive fetal yawning movements in a 27‐week fetus over a 7‐min period. Each episode lasted for 4–6 s, and the intervals between them varied from 21 to 195 s. This case demonstrated that fetal yawning, a complex involuntary behavioral reflex, is present in its full extent during the second half of pregnancy. Copyright © 1995 International Society of Ultrasound in Obstetrics and Gynecology Copyright © 1995 International Society of Ultrasound in Obstetrics and Gynecology