Laboratory-made embryos can save extinct rhinoceros species



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There are many risks involved. Researchers will test their approach using southern rhinoceroses as substitutes, but a complicated procedure (females must be anesthetized for two hours) and a limited amount of sperm from the north (only four dead males) do not give scientists much of a chance . If they are out of supply or if northern rhinos encounter an early end, there may be no turning back. The limited genetic variety would also cause problems – it could take a long time (if that can happen at all) before there is enough diversity to ensure a thriving population.

Still, there is a lot of hope. The research unit hopes that the stem sales technology can create more eggs and sperm from the skin cells of 12 northern whites, increasing the supply and genetic variety. Nor do they think that it will take too much time to add to the species: they hope to witness the first white birth of the North in three years, which explains the 16-month-old rhinoceros pregnancy period. If scientists tear it up, they will both save a seemingly doomed animal and provide a plan to protect other animals that are on the verge of oblivion.

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