What is required for a human organism to be considered a rights bearer?

[Ravenshire]

Therefor if an embryo or a fetus does not in your opinioin bear human rights then what is necessary to bear these rights and why?
If it does then this thread is not for you.

If there's any time before birth, I would have to say at the point that it can survive, without heroic measures, outside the womb.

Bodily autonomy trumps any rights before that point. Unless you want to argue that compulsory blood/tissue donations are also a good thing.