1st in vitro Puerto Rico crested toad gives scientists hope

A critically endangered Puerto Rican toad was for the first time born via in vitro fertilization as U.S. scientists attempt to save it from extinction, officials announced last week. Olaf - named in honor of the frozen semen he came from — is the first of more than 300 Puerto Rican crested toads that hatched after ...

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1st in vitro Puerto Rico crested toad gives scientists hope

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