According the mother nature and divine will, if you will...
A woman needs a man to do Meiosis. After Puberty, Menziz bodies do meiosis all on their own. Likewise men give all four of their gametes a fair shot, as men have the upper hand (usually on being fair). This is reflective of their biological nature for the INTERMEDIATE stage of being a human with half the matrix of life.
But for women or girls or female fetuses, they start doing meiosis before way before men! YET, THEY NEED a man to finish MEIOSIS. If a woman never plays a "successful song" on the "Shaggy English Xylophone" with a man then she NEVER finishes a single round of MEIOSIS.
"A woman needs a man for meiosis, like a fish needs water to produce the next generation."