undergoing X-reactivation in primordial germ cells before meiosis, leading to:
# Xa^M Xa^P diploid germ cells in meiotic arrest. As the meiosis I only completes with ovulation, human germ cells exist in this stage from the first weeks of development until puberty. The completion of meiosis leads to:
# Xa^M AND Xa^P haploid germ cells (eggs).

The