As of January 2014, no information has been released that confirms or indicates that Kari Byron is pregnant with her second child.
Paul Urich and i am assuming you mean Kari Byron!
Byron
Kari Byron
Paul Urich
In the episode Cold Feet.
Kari Byron, a television personality from the program 'Mythbusters' has worked on the show since the year 2003. There are no reports of her leaving the program anytime soon.
season 5
She is now, but if you mean in 2009/2010, she was on maternity leave
Kari Byron has 1 child
Kari Byron. The new blonde one is Jessi Combs. (Season 6+)
She slipped in ballistics gel, and dislocated her knee.
Yes, Kari Byron married to Paul Urich in 2006