Standards of mid-trimester obstetric ultrasound in Australia.
de Crespigny
L
L
Ultrasound Department, Royal Women's Hospital, Melbourne, Vic.
D001315:Australia; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal / Q000592:standards* / Q000706:statistics & numerical data