[Use of echography in first trimester abnormal pregnancy].
D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011261:Pregnancy Trimester, First; D014463:Ultrasonography
Indications de l'échographie dans la grossesse pathologique du premier trimestre.