Who decides the Gender?

If you are thinking that as your Wife gives birth to your child she decides the gender of your child as a girl or boy, Then you are underestimating your self and your whole Gender.

As Its a proven fact that A Man has one X chromosome and one Y chromosome,while a Woman has two X chromosomes, The Gender of the child Depends on the Man's which chromosome combines while Woman's one of the same two X chromosomes.

So ,Its completely depends on Mans chromosomes which pairs with Woman's chromosome,

For example if Mans X chromosome takes part in the formation of the new child than the pair becomes XX which makes child a girl and if Y takes part in the process than the pair becomes XY which makes child a boy.