Table 1. Main morphological and structural features of the nuclear and cytoplasmic compartment in bovine oocyte in relation to chromatin configuration (modified from Lodde et al.⁴¹).

	GV0	GV1	GV2	GV3
Nucleus	Eccentric	Peripheral	Peripheral	Peripheral
Undulation of the nuclear envelope	Nearly absent	Slight	Profound	Profound
Nucleolus	Fibrillo granular	Dense fibrillar	Dense fibrillar	Dense fibrillar
Cytoplasmic organelles distribution	Sparse in the cytosol	Homogeneous in the oocyte cortex	Homogeneous in the oocyte cortex	Clustered in the oocyte cortex
Ooplasmic vesicle	Few	Abundant	Abundant	Plentiful
Perivitelline space	Absent	Present	Present	Present
Microvilli	Erected	Bent	Bent	Bent
Mitochondria (location)	Round (small clusters in the cytoplasm)	Hooded (deep cortical)	Hooded (deep cortical)	Hooded (peripheral)
Golgi complex	Present	Reduced	Almost absent	Almost absent
Cortical granules	Singular, all over the cytoplasm	Clustered, deep cortical	Clustered, deep cortical	Clustered, peripheral (some sign of degeneration)