Final answer:
The primary oocyte development is paused in the first prophase stage of meiosis I. It finishes the first meiotic division during adolescence, resulting in the formation of a secondary oocyte and a polar body. The secondary meiotic arrest occurs at the metaphase II stage until ovulation.
Step-by-step explanation:
The primary oocyte development is paused in the first prophase stage of meiosis I. At the time of birth, all future eggs are in the prophase stage. The primary oocyte finishes the first meiotic division during adolescence, resulting in the formation of a secondary oocyte and a polar body. The secondary meiotic arrest occurs at the metaphase II stage until ovulation.