title: Diagnostic ultrasound in the first trimester of pregnancy.
mesh_terms: D000030:Abortion, Missed / Q000175:diagnosis; D000032:Abortion, Therapeutic; D001706:Biopsy / Q000379:methods; D002824:Chorionic Villi / Q000473:pathology; D004107:Dilatation and Curettage; D005260:Female; D005333:Fetus / Q000033:anatomy & histology; D006801:Humans; D007434:Intrauterine Devices; D010388:Pelvis / Q000033:anatomy & histology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011249:Pregnancy Complications, Cardiovascular / Q000175:diagnosis; D011261:Pregnancy Trimester, First; D011271:Pregnancy, Ectopic / Q000175:diagnosis; D011272:Pregnancy, Multiple; D014328:Trophoblastic Neoplasms / Q000175:diagnosis; D014463:Ultrasonography; D014592:Uterine Hemorrhage / Q000175:diagnosis; D014594:Uterine Neoplasms / Q000175:diagnosis