Spoilers from Ausiello!
Question: Any idea if Emily Deschanel’s pregnancy will be worked into Bones? -Megan via Facebook
Ausiello: Producers are still deciding what impact, if any, Deschanel’s future baby bump will have on Brennan’s storyline. One thing’s for sure: Any possible plot tweaks wouldn’t play out on air until fall. The scripts for this season’s final episodes have already been written and they’re not changing.
Source
LOL, I'm already sick of this question.
Ausiello: Producers are still deciding what impact, if any, Deschanel’s future baby bump will have on Brennan’s storyline. One thing’s for sure: Any possible plot tweaks wouldn’t play out on air until fall. The scripts for this season’s final episodes have already been written and they’re not changing.
Source
LOL, I'm already sick of this question.