New life comes not from sex but from the soul

It is not the semen of the man that

creates life within the womb of a woman; rather, the living entity, the

soul, takes shelter in a particle of semen and is then pushed into the

womb of a woman. Then the body develops. There is no possibility of

creating a living entity without the presence of the soul simply by

sexual intercourse. The materialistic theory that there is no soul and

that a child is born simply by material combination of the sperm and ovum

is not very feasible. It is unacceptable.

Srimad Bhagavatam 3.31.1 purport