title: Use of ultrasound for placental localization in genetic amniocentesis.
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology; D000649:Amniocentesis; D000653:Amniotic Fluid / Q000166:cytology; D002478:Cells, Cultured; D002869:Chromosome Aberrations / Q000175:diagnosis; D025063:Chromosome Disorders; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis / Q000235:genetics*; D006801:Humans; D007621:Karyotyping; D008423:Maternal Age; D010920:Placenta; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013048:Specimen Handling; D014463:Ultrasonography; D014599:Uterus / Q000033:anatomy & histology