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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:Reduced fetal femur/foot length ratio
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Accession:HP:0025663 term browser browse the term
Definition:This ratio relates the length of the fetal femur to that of the fetal foot. The ratio is approximately 1 throughout the age range of 14 to 40 weeks of gestation. A substantial reduction in the raio can help differentiate fetuses that have dysplastic limb reduction from those whose limbs are short because of constitutional factors or IUGR. It can reduce the problem of an unknown gestational age and help to distinguish between fetal skeletal dysplasia and intrauterine growth retardation caused by other factors.

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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
              Reduced fetal femur/foot length ratio 0
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