I am moving this to the rabbitry area. a
This is the first thing you should probably read:
http://www.rabbitsonline.net/view_topic.php?id=5541&forum_id=8
It is pinned at the top of the rabbitry forum.
Count 31 days from when you caught them mating and that is approximately when babies will be due if your doe got pregnant.
At day 28, you will want to give her some sort of a nestbox with hay or stray in it. Depending upon the size of your rabbit, a shoebox might work. It will help if you can let us know what breed your rabbit is.
I do hope that the dad is not larger than the mom as that can cause complications like stuck kits, etc.
When you give the doe the nestbox, I would also start giving her Tums or some antacid pills that are chewable and have calcium in them. I buy the berry flavored ones at Walmart and use them. She will get one per day - I break them in half and they normally eat them out of my hand. This will help her to keep from having calcium deficiency.
Please note that your doe will get most likely get grumpy during this time, she will sleep a lot more than usual, and she will get larger. These are all normal. She may go off her feed a day or two before she delivers the babies...once again, this is normal. You do not need to increase her feed during the pregnancy.
If she did not get pregnant, she may have a "false pregnancy" and make a nest and pull fur around day 16-18 I think. However, she will not have babies.
You will know when your doe is ready to give birth because she will start carrying hay around in her mouth. She may start this as much as aweek early - or as late as immediately before giving birth. When she starts pulling fur for her nest - you know she's close to delivery -although one of my does JUST gave birth minutes ago and she'd been pulling fur for 4 days. (Today was her due date).
Peg
P.S. Let us know what other questions you might have after reading the link I provided and let us know the breeds of the doe and buck if you can!