My guess is that the fetal stem cells no longer exist now that the fetus is, well, no longer a fetus. And they have shown that Hera does get sick at least twice.
True, I guess it wasn't simply her blood, more so her stem cells. Good point.
On the subject of the final five, I am going to bet that they are Cylons in the sense that they have reincarnated many times over the millenniums, but otherwise don't have much to do with the Cylons we know and love. Heck, the tag line "there are many copies" might not even apply to them.
Which then would tie into the cryptic "this has all happened before and will happen again" concept. Technically, the Colonies lost contact with the Cylons for only 40 years after their exile and presumably built them a few decades before that. So if the Cylons weren't even created by man yet at that point, how is it that these final five have been around for millennia?

Or, when the current Cylons speak of there being 12 models, does this mean that they weren't all created at the same time? That, as you say, the final five were in fact the "first five", whom existed a long time ago, and when the other 7 "new" ones were created all they had were myths and stories about their predecessors? This would almost have to be the way it is, otherwise, if they were all created at the same time, how do you lose so much information about 5 of your models which were presumably created at the same time as yourself, and lose touch with them over the short period of 40 years?
But, if the final five have existed for hundreds of years (thus validating the whole Eye of Jupiter thing) then how does it work that the Colonies, hundreds of years later, invented the Cylons (again?

) - two batches of Cylons spread over hundreds of years, yet somehow linked? And no record of these previous Cylons either?
It will be an interesting revelation when the time comes, because for all intents and purposes, as far as we know (and as far as the humans themselves know!) the Cylons were created by man a few decades before they were exiled and then revolted 40 years afterwards - this is a short period of time, not hundreds of years.... Don't you think there would be something in the history books if man created robots who revolted on them previously, to serve as a warning? What are the odds it would happen twicw?
Anywho, there's another brain dump for ya...
I have a theory about the final 5, given my track record I would put money on it being wrong but I'll put it in white just in case:
Interesting theory, I haven't heard anything like that before. Who knows!
She has memories of a mother and a childhood, has anyone in the fleet actually grown up along side her? Even Sharon had memories of childhood before she found out she was a Cylon.
True, quite true... Although Simon in The Farm indicated she had fractures from when she was young, which would imply she wasn't built and rolled off an assembly line as-is.

Plus, they were trying to impregnate her, so why would they do that if she was a Cylon? Mind you, they don't know who the final five are either, so...
