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The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (

Term:maternal age at birth of first offspring
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Accession:CMO:0002510 term browser browse the term
Definition:The age, that is, the duration of the life of the mother at the point in time when her initial offspring is born; the earliest or youngest age at which a specific individual has given birth.
Synonyms:exact_synonym: age at first birth measurement
 xref: EFO:0009101

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  clinical measurement 2369
    reproduction measurement 2
      maternal age at birth of first offspring 0
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