Leyun Wang/Chinese Academy of Sciences

Genetic engineering helps same-sex mouse pairs have kids

For the first time, mice who are the genetic offspring of two fathers have been created with the help of CRIPSR-edited embryonic stem cells, National Geographic reports. A different team demonstrated the same technique with mouse moms in 2004, but only one of the 10 mice born in that experiment grew to adulthood. In this new study, several of the bimaternal mouse pups lived to adulthood and produced offspring of their own, whereas all of the pups with two dads died within 2 days, the researchers report today in Cell Stem Cell. The scientists say the technology is still far too preliminary to be considered for use in human reproduction.

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