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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.

Term:Irregular menstruation
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Accession:HP:0000858 term browser browse the term
Definition:Abnormally high variation in the amount of time between periods.
Comment:Most women have between 11 and 13 menstrual periods each year. Bleeding usually lasts around 5 days (range: 2 to 7 days). When menstruation first starts, it can take up to 2 years to establish a regular cycle. After puberty, most women's menstruation is regular. The length of time between each period is similar. The normal menstrual cycle length is 28 (+/- 7) days days with the menstruation lasting between 2 and 7 days. It can take up to 2 years from menarche to develop a mature hypothalamic-pituitary-gonadal (HPG) axis. Within 1 year, 75 percent of girls have a cycle between 21 and 45 days. By the fifth gynecological year, 90 percent of girls will have regular cycles.
Synonyms:exact_synonym: Irregular menses;   Irregular periods;   Menstrual irregularities;   Menstrual irregularity
 xref: SNOMEDCT_US:80182007;   UMLS:C0156404



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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the genitourinary system 0
        Abnormality of the genital system 0
          Abnormality of reproductive system physiology 0
            Abnormal female reproductive system physiology 0
              Abnormality of the menstrual cycle 0
                Irregular menstruation 0
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