Research

Ram sperm frozen for 50 years successfully used to impregnate 34 ewes

Semen stored since 1968 in a laboratory in Sydney has been defrosted and successfully used to impregnate 34 Merino ewes, with the resulting live birth rate as high sperm frozen for just 12 months. https://phys.org/news/2019-03-ram-sperm-frozen-years-successfully.html

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