Oocytes develop in the ovaries by a form of meiosis called oogenesis.There are three stages: proliferation period, growth period and maturation period in oogenesis.

• 摘要卵细胞在卵巢中进行减数分裂的过程叫作卵的发生，这个过程包括增殖期、生长期以及成熟期3个阶段。