I guess these studies are needed to try to prove that "gay" couple can raise children normally but since these studies always point to the damage that is done, they are discounted or attacked by the homosexuals as biased and/or flawed.
I have known more than my share of "gays" in my life - and none of them should be anywhere near children, much less responsible for providing a stable and supportive basis for their development.
Don’t these folks know that you never research or question:
1. Global warming
2. Darwinian evolution
3. Homosexuality
Fools.
</sarcasm>