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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:Umbilical cord knot
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Accession:HP:0030655 term browser browse the term
Definition:An entwining of a segment of umbilical cord, usually without obstructing fetal circulation and commonly result from fetal slippage through a loop of the cord.
Comment:When the true knot remains tight, it may impede the circulation of the fetus and may result to fetal death in utero especially in labor.
Synonyms:xref: SNOMEDCT_US:237309005;   UMLS:C0344363

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of prenatal development or birth 0
        Abnormalities of placenta or umbilical cord 0
          Abnormality of the umbilical cord 0
            Umbilical cord knot 0
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