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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:Hypoplasia of fetal nasal bone
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Accession:HP:0011430 term browser browse the term
Definition:On prenatal ultrasound, the nasal bone is a thin echogenic line within the bridge of the fetal nose. The fetus is imaged facing the transducer with the fetal face strictly in the midline. The angle of insonation is 90 degrees, with the longitudinal axis of the nasal bone as the reference line. Calibres are placed at each end of the nasal bone. Absence of the nasal bone or measurements below 2.5th percentile are considered significant (PMID:16100637).
Synonyms:exact_synonym: Hypoplasia of foetal nasal bone;   Underdeveloped fetal nose bone;   Underdeveloped foetal nose bone
 xref: UMLS:C4023363

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of prenatal development or birth 0
        Fetal anomaly 0
          Abnormal fetal morphology 0
            Fetal ultrasound soft marker 0
              Hypoplasia of fetal nasal bone 0
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