For stage 1 also known as immature stage, the color of the oocytes was sometimes difficult to recognize because the oocytes showed transparent and translucent in color. Furthermore, stage 1 ovary was built from oogonia that concentrated mostly at the periphery of the ovary. Each oogonium that formed in ovary was spherical in shape and the cytoplasm is hardly visible.
Stage 2 (early maturing), ovary was yellow in color and small egg globules started to appear inside the larger oocytes as soon as vacuolated globules disappeared from the cytoplasm. But, the egg globules did not occupy the entire cytoplasm. Stage 3 or late-maturing stage showed that ovary was light orange in color. In this stage, the oocyte grows rapidly and the nucleus reached maximum size.