Oogonia are found in the ovary oogonia are found in the ovary during fetal development and childhood until puberty during childhood until puberty primarily during fetal development throughout the female's lifetime

Oogonia are found in the ovary primarily during fetal development. Oogonia are small, diploid germ line cells that migrate to the ovarian cortex and multiply by mitosis. Some of these cells develop the potential to become mature female gametes and become primordial follicles, which occurs in the first few months of gestation. 

The correct answer is d