However, to secure a future for other Critically Endangered species of rhino, the Sumatran and Javan rhino, in particular, our primary focus must be to reduce the current threats, so that no other rhino species dips to such low numbers that IVF and / or ARTs are the only option. Developing high-tech reproductive science is one approach for the Northern white subspecies, ART is the only remaining option. Only by using a mixture of strategies will we reduce these threats. We hope that this research brings forward a wealth of information to benefit other rhino species.Īll five species continue to be threatened by intense poaching and habitat loss. Using Advanced Reproductive Technologies (ART) to “bring back” the Northern white rhino is a complex, highly difficult endeavour, and creating early-stage embryos is one step on a long journey. Knowledge is gained with each new development, however, we remain a long way away from having a viable (>20 unrelated animals) population of Northern white rhinos. This project has been underway for a number of years, with partners from science and conservation around the world (Germany, Kenya, the United States, the Czech Republic and Italy). The next step for these embryos will be a major hurdle: developing a viable pregnancy with a surrogate Southern white rhino has not yet been achieved. This is the first time that scientists have been able to produce embryos for Northern white rhinos using in vitro fertilisation (IVF) it is a significant achievement. The next step for this process is to transfer the eggs into a surrogate Southern white rhino at a later date, in the hope that a new Northern white calf will eventually be born. The scientists working on the project have stated that two eggs (and in December 2019 a third egg) developed into the blastocyst (early embryo) stage. The eggs were then injected with sperm cells from two deceased Northern white rhino bulls. In this successful fertilisation, scientists at Avantea laboratory matured seven of the eggs in vitro (in a culture dish). Neither Najin nor Fatu are able to carry a pregnancy to full term due to age and / or reproductive tract issues. The embryos were created using eggs from one of the last two of the subspecies (Fatu), after five oocytes (egg cells) were harvested in August 2019 from both Fatu and her mother Najin, the last two Northern white rhinos remaining, who live out their days at Ol Pejeta Conservancy in Kenya. An elderly northern white rhino lives under armed guard in Kenya as his species quickly heads toward extinction Story by Kevin Sieff Photos by Nichole Sobecki Published on JIn. All embryos now remain frozen under liquid nitrogen. With only two females surviving of the subspecies, this development is a huge step for Northern white rhinos. On 11 September 2019, scientists from the Avantea laboratory in Italy announced that they had successfully created two Northern white rhino embryos. Scientists have successfully created embryos of the functionally extinct Northern white rhino Those involved with the project announced that further embryos had been successfully created throughout 20, bringing the total number of embryos to 12 in July 2021.
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