What is the difference between primary oocyte and secondary oocyte?

Primary oocyte:

The primary oocyte is produced by the process of oocytogenesis that occurs during the embryonic stage

Secondary oocyte:

An oocyte is produced by the division of a primary oocyte in the first meiotic division.

Differences between primary and secondary oocytes are:

Primary oocyte	Secondary oocyte
The formation of the primary oocyte takes place when the female child is still in the womb.	The formation of the secondary oocyte takes place at the onset of puberty.
2. It is surrounded by secondary follicles.	2. It is surrounded by tertiary follicles as well.
3. The chromosome number is 46.	3. The chromosome number is 23.