A female child is born with all the primary oocytes required during her lifetime. At which one of the following stages of cell division are these oocytes found at birth?

Step-by-step solution

Oogenesis is initiated during the embryonic development stage when millions of oogonia are formed within each fetal ovary. These cells start division and enter into prophase-I of the meiotic division. They get temporarily arrested at this stage and are called primary oocytes. Therefore, at birth, all the primary oocytes in a female child are arrested in the Prophase I stage of meiosis. Answer : Prophase I