The 18 to 20 week obstetrical scan.
McCusker
C P
CP
D001315:Australia; D005260:Female; D017048:Health Care Costs; D006801:Humans; D010923:Placenta Previa / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal / Q000191:economics*