||Primordial follicles characterized by small oocytes with centrally located nucleus containing a single large nucleolus.
||Left ovary translucent and grainy in texture. Right ovary difficult to impossible to find.
||Primary growth follicles with larger nuclei, basophilic oocytes cytoplasm, and multiple nucleoli located at the periphery of oocyte nucleus.
||Looks the same as stage 1 when observed without a microscope.
|| Primordial cortical alveoli stage, characterized by distinct clusters of enlarged oocytes, with PAS-positive cortical alveoli in the peripheral cytoplasm
||Individual oocytes slightly orange, 0.25-0.50 mm in diameter, and visible to the naked eye.
||Vitellogenic oocytes with cytoplasm containing yolk bodies and surrounded by two layered zona radiate.
||Fertile and ripe females. Abdomen is enlarged with egg mass and observable without dissection. Oocytes are bright orange and about 1mm in diameter. Eggs can be stripped with gentle pressure.
||Postvitellogenic oocytes characterized by fusion of yolk bodies into homogenous yolk mass.
||Females that have not released their eggs for some reason. Oocytes are lager than 1mm in diameter, and hydrated. Clear fluid surrounds the orange oocytes that becomes increasingly cloudy and degenerate.
||Postovulatory follicles with no oocytes and folded follicular layers
||Females that have successfully spawned. Gonad is translucent and textured with a few leftover oocytes embedded in tissue. Loose abdomen easily detected.