<Tr> <Td> Oogonium </Td> <Td> diploid / 46 (2N) </Td> <Td> 2C </Td> <Td> Oocytogenesis (mitosis) </Td> <Td> Third trimester </Td> </Tr> <Tr> <Td> primary oocyte </Td> <Td> diploid / 46 (2N) </Td> <Td> 4C </Td> <Td> Ootidogenesis (meiosis I) (Folliculogenesis) </Td> <Td> Dictyate in prophase I for up to 50 years </Td> </Tr> <Tr> <Td> secondary oocyte </Td> <Td> haploid / 23 (1N) </Td> <Td> 2C </Td> <Td> Ootidogenesis (meiosis II) </Td> <Td> Halted in metaphase II until fertilization </Td> </Tr> <Tr> <Td> Ootid </Td> <Td> haploid / 23 (1N) </Td> <Td> 1C </Td> <Td> Ootidogenesis (meiosis II) </Td> <Td> Minutes after fertilization </Td> </Tr>

When do the egg cells of a human female begin meiosis