(Since no one is challenging my previous posts...)
One thing that strikes me in you all's learn-ed dialog is that there is a curiosity about the physical aspects of the birth of Christ that, for some, anyway, seems to be unwilling to simply accept that a miracle is miraculous. Now I get that we want to know that Christ was human in the same sense that we are, as well as only more so. But it seems as if some are looking for a scientific explanation consistent with what we know about people in general, and won't be satisfied unless they can synthesize their faith with science. Hopko was definitely of that type, and the whole danger and criticism some of us have of that approach ( synthesis) is that it elevates temporal earthly knowledge to be equal with, or superior to, what we accept by faith. And in that, it becomes less faithful. Abraham showed his faith by accepting what made no earthly sense in sacrificing his son. But we are in danger of doubting the Faith if we suspect Christ didn't have birth fluids or a belly button, and so, wind up insisting on His having them so we can keep our synthesis. Me, I'm cool with saying "I don't know".