I do think it's the same actually.
Who cares if they are both called "mom" or "dad".
The bottom line is they usually go with the woman that is genetically matched to the child.
That's pretty much how it goes.
NOOOO, they generally go with the woman in the relationship...it just so happens that b/c a normal relationship consists of one man and one woman that generally that one woman is the genetic giver for half...
If a woman who is infertile has an impreganted egg placed in her uturus, she will be the mother even if she isnt the genetic giver....B/C SHES THE FEMALE!!!
the mom in other words...
I do follow your logic however even though its not the same as a hetero couple and I think that would be a sufficient declaration.