Please stop misconstruing my question. I can't tell if it's a joke or not in your case, but it's worn thin considering I explained it several times now.
How have I misconstrued your question exactly?
From what I understand you're seriously considering the possibility of a population drop. If you mean that in any way relevant to the topic of this thread it's just laughable.
If you want a serious answer to your question, then no, homosexual marriage isn't going to cause a decrease in population.
I'm not going to cite sources, I'm not going to substantiate it with evidence. That topic itself is entirely a waste of my time.
You're gonna just have to take my word for it.