The karyotypes of 7 douc langurs (Pygathrix nemaeus) and 3 crowned lemurs (Lemur coronatus) were examined. Abnormalities in 23.5% of the karyotypes of 1 male douc langur were associated with a history of fathering stillborns and abortuses (38%). Karyotype analysis of an apparently normal female lemur revealed three differing karyotypes, one normal and two abnormal.
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