Anatomy Term: oocyte
XAO ID: 0000256
Definition: "The developing female gamete, the differentiation of which is classified into six stages: I (pre-vitellogenic), II (early vitellogenic), III (mid-vitellogenic, formation of pigment), IV (polarization along animal-vegetal axis), V (late vitellogenic), and VI (post-vitellogenic, appearance of equatorial band)."
Stage Range: oocyte stage I to mature egg stage
Component Anatomy Items:
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References: NCBO BioPortal, Ontology Lookup Service