
From Times Online,
"Professor Nayernia said the IVD sperm have key traits of real sperm, including a haploid nucleus that has 23 chromosomes, instead of the 46 found in non-reproductive cells. “These cells are haploid, they have tails and a head, and they swim,” he said. “The only cells in the body that are like that are sperm.”"
This solved a millennium question of whether the chicken or the egg exist first. But science would only be possible if there is already a law exist in the nature.
'Synthetic sperm’ from stem cells raises hope for male infertility
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