The showrunner said that the tone of his programme would remain the same once Brennan (Emily Deschanel) and Booth (David Boreanaz) become parents in tonight's (April 2) US episode.
"There's always been that balancing act in the show of their personal life and the cases, but we're a murder show," he told TV Guide.
"So, the baby will be a part of the show, because it's a part of their lives. But somebody is still going to be murdered in a heinous and cruel way... The balance won't change, but the context will."
Bones creator Hart Hanson also revealed that Brennan will struggle to adapt to motherhood and find her new status "very disorienting" at first.
"We've always seen Brennan as a character who... did not want to engage with life or had to be protected by a veneer of rationality and logic and science," he said.
"Now she has a child... Her happiness is contingent upon another person's happiness... So, she is now a big open bruise because of another human being and she will find that very disorienting."
Nathan has also said that he wants to give other Bones characters "more extensive arcs" in the show's recently-announced eighth season.
Bones returns to Fox at 8/7c. In the UK, the show airs on Sky Living.