But results are only preliminary, researchers caution.
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References
Lee, J. H. et al. Stem Cells Dev. doi:10.1089/scd.2009.0063 (2009).
Nayernia, K. et al. Dev. Cell 11, 125-132 (2006).
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Ledford, H. Sperm-like cells made from human embryonic stem cells. Nature (2009). https://doi.org/10.1038/news.2009.646
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DOI: https://doi.org/10.1038/news.2009.646