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Fig. S1 Developmental stages of the oocytes. Stage 1, perinucleolar oocytes. The oocytes size was small and ooplasm lacks granular structure. Stage 2, cortical alveolar oocytes. The vitelline envelope (zona radiata) begin to form. Stage 3, vitellogenic oocyte. The oocyte increased in size; the granular structures in ooplasm were larger and the nucleus was irregular in the shape. Stage 4, mature oocyte. The nucleus could not be observed due to the granular structures that filled up the entire cytoplas. Atretic stage. Oocyte and the vitelline membrane structure started to disintegrate.
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Full text @ Dis. Model. Mech.