title: Ultrasonics in early pregnancy: diagnostic scanning and fetal motor activity.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D005321:Extraembryonic Membranes / Q000502:physiology; D005260:Female; D005315:Fetal Diseases / Q000503:physiopathology; D005333:Fetus / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D006828:Hydatidiform Mole / Q000503:physiopathology; D008875:Middle Aged; D009043:Motor Activity; D010920:Placenta / Q000502:physiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000503:physiopathology; D011271:Pregnancy, Ectopic / Q000503:physiopathology; D011272:Pregnancy, Multiple; D014465:Ultrasonics / Q000009:adverse effects / Q000295:instrumentation; D014463:Ultrasonography; D014599:Uterus / Q000502:physiology