Answer:
An oocyte is an immature egg cell that is produced in a female fetus in the ovary during female gametogenesis. It develops to maturity from within a follicle, which is found in the outside layer of the ovaries.
Without seeing the diagram you are referring to, it is difficult to determine the exact location where an unfertilized female sex cell can be correctly termed an oocyte. However, it is likely that the correct location would be within the ovary where the oocyte is produced.