Primordial germ cells (PGCs) are germline-restricted embryonic cells that form the functional gametes of the adult animal. The use of avian PGCs in biobanking and producing genetically modified birds has driven research on the in vitro propagation and manipulation of these embryonic cells. In avian species. PGCs are hypothesized to be sexually undetermined at an early embryonic stage ... https://www.roneverhart.com/Oakley-Fives-4-0/