AMES, Iowa – Beef and dairy producers want the animals in their herds to possess the best genetics possible. But a cow can have only one calf per year, which places a natural limitation on how widely ...

Quick Take Preserving the northern white rhino now requires overcoming functional extinction, as there are only two females ...

Scientists at the Smithsonian Conservation Biology Institute and the Columbus Zoo have successfully transferred cheetah embryos produced by in vitro fertilization to a surrogate cheetah mom for the ...

Researchers in Kenya successfully transplanted a white rhino embryo into a female surrogate for the first time. The pregnant mother-to-be died from an unrelated illness before she could give birth, ...