bull, many do six, or would the parents who have sextuplets have gotten pregnant 2 or 3 times at the exact same time as they had their 2 implanted?
Even if, as you say, they only implant 2, how many do they create to get those 2 viable? 4,6? What becomes of them, or are they just arbitrary? Any way you slice it, life is created in a lab just to be discarded when the choicest is implanted. It is agregious and disgusting to play God in this fashion and completely selfish and unecessary. We will not agree on our outlook here, time to move on.
Oh, and you need a simple lesson in biology to understand how multiples occur. I'll give you an example: a friend of mine had IVF and two embryos transferred. One split and she has three children.