In Belgium this understanding has resulted in laboratory costs for IVF and ICSI being reimbursed under a strict embryo transfer policy to secure the prevention of multiple pregnancies.

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But the passage about 2035 that the WWF report quotes comes not from that ICSI report (which was unpublished) but from an article that appeared around the same time in Down to Earth, an Indian magazine.

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The chances of male parent to baby transmission is small, especially using ICSI, but Dr Jean Cozzi, from Jean Verdier Hospital near Paris, said that the technique could provide reassurance to parents desperate to avoid even the slightest chance.

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The report was put together by David Moore and Stefan Savage of the University of San Diego Department of Computer Science and Engineering, Vern Paxson of the ICSI Center for Internet Research in California, Colleen Shannon of CAIDA, and Stuart Staniford and Nicholas Weaver of computer security firm Silicon Defense.

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