To ladies living in U.S., when are you going back to work?

Justia
To ladies living in U.S., after how many months or weeks post delivery are you going back or did you go back to work? 
It seems that several other countries have longer maternity leaves than U.S. (I found out as I had a post before about maternity leave for all). I'm just curious to the ladies living here. 
I am return to work after 10 weeks and that's such a short time :(