This is for an essay, I am not having children.

Roman catholics ban fertility treatments because
-they involve fertilization outside the womb, and god intended sex to be the only method of procreation.
-processes using IVF involve embroyos being wasted, similar to abortion.

But why do they say these things?
What bible passage support this?
I've done alot of research, I just need a bible passage.

Acupuncture for Infertility