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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Abnormal fetal nasal bone visualization
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Accession:HP:0025705 term browser browse the term
Definition:Abnormal appearance or non-visualization (apparent absence) of the nasal bone of a fetus in first trimester sonographic screening. Assessment of the fetal nasal bone is generally performed at 11-14 weeks gestational age.

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of prenatal development or birth 0
        Fetal anomaly 0
          Abnormal fetal morphology 0
            Abnormal fetal skeletal morphology 0
              Abnormal fetal nasal bone visualization 0
                Absent fetal nasal bone 0
                Hypoplastic nasal bone 0
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