The fetal ventricular atrium: fourth down and 10 mm to go.
Filly
R A
RA
Goldstein
R B
RB
D002552:Cerebral Ventricles / Q000000981:diagnostic imaging* / Q000196:embryology; D005260:Female; D006801:Humans; D011247:Pregnancy; D012016:Reference Values; D016216:Ultrasonography, Prenatal