part_of part of is part of part of only in taxon in taxon results in maturation of oocyte oocyte maturation biological_process Wikipedia:Oocyte_maturation 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. GO:0001556 developmental process involved in reproduction developmental maturation cellular process involved in reproduction in multicellular organism cell maturation oocyte development Metazoa