ADAM: I can't promise that the show will revisit that story in conjunction with Angela's pregnancy, but executive producer Stephen Nathan certainly hasn't forgotten about Brennan's desire to be a mother — or Booth's part in helping out. "Brennan expressed a desire and it surprised her," he says. "And while that moment has passed, Booth's donation still exists. That's really all I can say about that at this point. But with Brennan expressing that desire, it's hard to un-ring that bell."
Source: TV Guide.com
Tipsters: omelette73, lysaleelee, Anna_1986, amc815
Digital Spy wrote on this spoiler. 'Bones' exec: 'Show will resolve baby plot' - Digital Spy
Tipster: MickeyBoggs
(The Digital Spy's title is misleading. It makes it seem as if it'll happen for sure and happen this season. They got their information from TV Guide, so the original source is right above.)