[Possibilities and limitations of placental echography].
D005260:Female; D005325:Fetal Organ Maturity; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology* / Q000502:physiology; D010923:Placenta Previa / Q000175:diagnosis; D010929:Placentation; D011247:Pregnancy; D014463:Ultrasonography
Possibilità e limiti dell'ecografia placentare.