| Phenotype: | oocyte stage IV oocyte maturation decreased rate of occurrence, abnormal |
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| Note: | This statement combines anatomy and/or ontology terms with phenotype quality terms to create a complete phenotype (EQ) statement. For detailed information on individual terms, click the hyperlinked term name. |
| Name: | oocyte stage IV |
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| Synonyms: | mature oocytes, oocytes stage IV, postvitellogenic oocyte, Stage 4 oocyte |
| Definition: | Oocyte part of stage IV ovarian follicle. Stage IV oocytes are large and filled with noncrystalline yolky bodies. |
| Ontology: | Anatomy Ontology [ZFA:0001568] |
| Name: | oocyte maturation |
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| Synonyms: | |
| Definition: | A developmental process, independent of morphogenetic (shape) change, that is required for an oocyte to attain its fully functional state. Oocyte maturation commences after reinitiation of meiosis commonly starting with germinal vesicle breakdown, and continues up to the second meiotic arrest prior to fertilization. |
| Ontology: | GO: Biological Process [GO:0001556] QuickGO AmiGO |
| Name: | decreased rate of occurrence |
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| Synonyms: | |
| Definition: | A rate of occurrence that is relatively low. |
| Ontology: | Phenotypic Quality Ontology [PATO:0055004] |