title: A critical assessment of ultrasonic fetal cephalometry.
mesh_terms: D000029:Abortion, Legal; D004453:Echoencephalography; D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006801:Humans; D008499:Medical Records; D008722:Methods; D008954:Models, Biological; D010781:Photography; D010969:Plastics; D011247:Pregnancy
chemical_list: D010969:Plastics