title: [Standards in the perinatal medicine--Doppler sonography in the gestation].
mesh_terms: D005260:Female; D005858:Germany; D006801:Humans; D018743:Perinatal Care / Q000592:standards*; D011247:Pregnancy; D011785:Quality Assurance, Health Care; D016216:Ultrasonography, Prenatal / Q000592:standards*