Fetal ear length.
A prenatal standard for ear length was developed from ultrasonic images of 180 normal subjects. Length increased from about 6 mm at 15 weeks to 33 mm at term and was well fit by linear regression (r2 = .96). Short ears (greater than or equal to 1.5 SD below gestational age average) were associated strongly, and specifically, with chromosomal disorders.
Birnholz
J C
JC
Department of Diagnostic Radiology Rush-Presbyterian-St Luke's Medical Center, Chicago, IL 60612.
Farrell
E E
EE
D000013:Congenital Abnormalities / Q000175:diagnosis*; D004431:Ear, External / Q000196:embryology* / Q000473:pathology; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography