That's another human being you've just created, not "your own material."
Disgusting personal attack, but typical.
You're advancing the utilitarian argument; I'm merely extrapolating your position to its logical conclusion.
When you say that even manipulating genetic material is wrong, you paint yourself into an irrational extremist corner.
Deliberately altering the reproductive process to induce a gross birth defect, solely to give yourself a figleaf to pretend that you're not creating a human being, is irrational and extremist.
Should we also refuse genetic therapy for cystic fibrosis?
One involves creating human beings solely for personal convenience. The other does not.
And what of the possible evolutionary costs?
You don't seem to give a damn about them--you just want to induce massive birth defects so you can "maintain the fiction."