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In some cases, a doe may fail to deliver the entire litter, and the fluids of the retained fetuses will be resorbed and mummified fetuses produced that remain in the uterus, usually causing permanent infertility. These cases can be diagnosed accurately by palpation. Because the doe will seldom conceive again, she should be culled from the herd. As is discussed in Chapter 11, development of mummified fetuses is one of the dangers of using test-mating as a means of pregnancy diagnosis.