the meiotic spindle: 紡錘體: 靠近PB較佳,但無絕對關聯 zona pellucida: 中空透明帶: 較薄較佳,但無絕對關聯 Vacuoles or refractile bodies:卵細胞質空泡: 較差,但無絕對關聯 the shape of the PB: 完整無碎片較佳,但無絕對關聯 dark cytoplasm or diffuse granulation & central granulation;卵細胞質中央顆粒: 較差,但無絕對關聯 perivitelline space: 空隙小及無雜質較佳,但無絕對關聯 the shape of oocytes 橢圓形卵: 較差,但無絕對關聯
cumulus–oocyte complex;成熟度好較佳,但無絕對關聯 cytoplasm viscosity and membrane resistance characteristics