A voice in the third trimester?

Quotable phrase: “his voice pregnant with emotion”
Citation: “Friend, in deed” by Lisa Black, Chicago Tribune online, Oct. 1, 2005
Usage: Page 2, second to last paragraph, talking about Tim Wambach who had run a 600 mile journey raising awareness about Cerebral Palsy: "Tim ran really for all the people who can't run, for all the people who have a struggle, who have a block," said Denis Berkson, his voice pregnant with emotion as he addressed the crowd. [color font mine]
Recommendation: Leave as is.
Rationale: Nicely expresses a voice heavy or loaded with feeling, also perhaps burdened but expectant for the future.