Bolstering genetic diversity among cheetahs

Researchers have discovered why older females are rarely able to reproduce -- and hope to use this information to introduce vital new genes into the pool. Scientists analyzed hormones, eggs and the uteri of 34 cheetahs at eight institutions, and determined that while the hormones and eggs of cheetahs older than 8 years appear normal, the animals' uterine tracks tend to suffer from abnormal cell growth, infections and cysts that prevent pregnancy.

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