If you know the doe has been bred before or aren't sure, ask your vet or local breeder to palpate the doe for any retained fetus.
Fetal resorption is nature's way of controlling the rabbit population.
Rabbits have the ability to reabsorb the soft tissue of an unborn fetus during periods of inadequate nutrition or stress.
The retained fetus is seldom toxic to the doe but may leave her unable to conceive again.
Does can conceive and pass the mummified fetus along with a live litter.