Originally Posted by SchrodingersCat
You can only inject one spermatozoon into an egg, then the egg goes into lock-down mode. But you could put the eggs into a sea of sperm from both men and let them duke it out.
Is it your own inability to conceive that requires you to consider IVF? Or the desire to have both men as fathers to the child without really "knowing" which one is biological? You could accomplish that the old-fashioned way.
Have you considered adoption? Plenty of kids need good homes, and that would eliminate the possibility of any father ever laying more "claim" to the child than the other.
I figured she meant IVF was the option for her fr fertility reasons (and because she wanted a biological child).
They usually implant more than one fertilized egg to increase the odds, so I don't see why they couldn't go half and half on who provided the sperms, provided they don't use an odd number or fertilized eggs.