The team, led by a professor of genome biology at Osaka University in Japan, generated eggs from the skin cells of male mice.
When implanted into female mice, the eggs produced healthy pups, according to research published this month in the journal Nature.
The proof-of-concept research could expand the possibilities for future fertility treatments, including for same-sex couples. However, scientists warn there is still much to learn before cultured cells can be used to produce human eggs in a lab dish.
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