If the doe does not mate with a male rabbit during estrus, her body will reabsorb the eggs that were released during ovulation. This process is called "pseudopregnancy" and it can last for about 18 to 21 days. During pseudopregnancy, the doe may exhibit some of the same signs as pregnancy, such as nesting behaviour and increased appetite. However, she will not actually give birth to any kits.
After pseudopregnancy, the doe will return to her normal reproductive cycle and will be able to go into estrus again if she is not pregnant.