Researchers create fertile female clones from male mice

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  Researchers produced healthy, fertile female clones from male mice by removing the Y chromosome from cloned male embryos.

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  The female clones had a single X chromosome and the same genome as the donor male except for the Y chromosome.

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  The clones mated with male clones and produced offspring with typical XX or XY chromosomes.

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  The researchers say the method could help create breeding pairs for endangered species with very few survivors.

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  The study has not yet been peer-reviewed, and the method may not work for mammals that cannot reproduce with a single X chromosome.

Who

Researchers created the clones. Ben Novak, who was not involved in the study, commented on its potential.

What

They used a CRISPR-based method to remove the Y chromosome from cloned male mouse embryos, producing fertile female clones.

When

The article was published on October 13, 2026. The timing of the experiments is Not stated.

Where

Not stated

Why

The researchers say the technique could help create fertile breeding pairs to support endangered species with few individuals left.

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