Usually 1 - 2 Hours or less A female rabbit is pregnant for about 31 days. The litter size can be anywhere from 1 to 12 bunnies, but the average litter size is about six. If you have a doe that is pregnant for the first time, her litter may be on the smaller side.The average birth weight for a bunny is 4-6 ounces. A healthy newborn bunny should be able to move around, have bright eyes, and be dry all over. If any of these things are not present, it’s best to consult with a veterinarian as soon as possible. After the babies are born, the doe will clean them and nurse them for about 10 minutes at a time. She will do this several times a day. The kits will stay with their mother until they are 8 weeks old, at which point they will be ready to live on their own.