I don't understand the guilt factor either; it just seems to be assumed by the original poster because he's against IVF. Those who are not against IVF (and I see many on FR) wouldn't understand why "guilt" would be an issue, either.
I guess its because many on FR don't have moral absolutes and they subscript to the philosophy of doing what is right in their own eyes which is a made up "standard" from bits and pieces collected a long the way composed of WHAT THEY WANT TO BELIEVE because it allows for situational ethics to suit their desire at the time
It takes strength of character to NOT do what you want to do in favor of
what is the RIGHT thing to do