Not much different. You are already outnumbered and it's already chaotic most times.
I had a much harder time going from 1 to 2 kids then 3 to 4. Now, I'm on to #5.

2000

2002

2006

2009

8/18/2011 twins at 10 wks

12/11

1/2012

4/2012

Expecting triplets!!! July, 2013 (is there a siggy for that?! )