Question

how we can reproduce the child

Answer 1

Hey mate here is your answer...
_________________________
_________________________

The average sperm lives only a few weeks in a man's body, and about 250 million are released with each ejaculation. ... The sex of the resulting embryo depends on which type of sperm burrows into the egg first. Sperm with a Y chromosome make a boy baby, and sperm with an X chromosome make a girl.

Answer 2

By fusion of egg and sperm