A cell in the female prior to meiosis.
A cell produced at the beginning of the development of an ovum.
A cell produced at an early stage in the formation of an ovum (egg cell). Primordial germ cells that have migrated to the embryonic ovary multiply to form numerous small oogonia. After the fifth month of pregnancy they enter the early stages of the first meiotic division to form oocytes.
The primordial cell from which an oocyte originates.