So you said same sex couples could create a child through the ectobiology thing but???? Humans need chromosomes from each gender, I think it would require a third, opposite gender parent for the child to come out normally. Otherwise I think the kid would come out terribly mutated.
I’m no biologist but I’m pretty sure chromosomes from two parents would be sufficient in making a non-mutated normal baby person regardless of the sex of the parents. And even if they aren’t ecto-biology is a fictional science so???