[Management before instrumental extraction of diagnostic difficulties of cephalic presentation. Value of ultrasonography].
Riethmuller
D
D
Clinique Universitaire de Gynécologie, d'Obstétrique et de la Reproduction, CHRU, Besançon.
Teffaud
O
O
Schaal
J P
JP
Maillet
R
R
D005113:Extraction, Obstetrical; D005260:Female; D006801:Humans; D007746:Labor Presentation; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000379:methods*