title: Use of ultrasound in the prenatal exclusion of primary microcephaly.
mesh_terms: D005260:Female; D005333:Fetus; D006257:Head / Q000254:growth & development; D006801:Humans; D008831:Microcephaly / Q000175:diagnosis* / Q000235:genetics; D010375:Pedigree; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis; D014463:Ultrasonography