If you happen to have a pair of rabbits, no doubt you will probably want to raise 
a litter. 

The first thing you will need is a proper nest box.  You can put about 2" of pine shavings, then shredded newspaper or computer paper, for the doe to kindle in. 
This pine shavings is optional. 

Thirty to thirty-one days after breeding, she will be ready to have her babies, so you must have a nest box in her cage about 2 to 3 days before her due date. 
Make sure she has a cage by herself and she will take care of the rest. 

A nest box is just a simple wooden box made from scrap plywood,  (never use treated wood).  The measurements can vary according to the size of your rabbit. 
For most Californians, make your box 18" long;  A dwarf rabbit will only need a small box made to fit her size. Just follow the diagram below and you should not have any trouble. 

Add the little 8"-12" wide shelf to the back end of the top as a resting spot for the doe, (you may also extend the top shelf over the side and put scew in from the top, 
this may give a little more support to the box, but be sure to cut off even with the sides), this gives her a rest away from the babies once they start getting out of the box.  She will love it!