Don't Clone Humans!
By Rudolf Jaenisch and Ian Wilmut,
Science
| 03. 30. 2001
The successes in animal cloning suggest to some that the technology
has matured sufficiently to justify its application to human cloning.
An in vitro fertilization specialist and a reproductive physiologist
recently announced their intent to clone babies within a year's time
(1). There are many social and ethical reasons why we would never
be in favor of copying a person. However, our immediate concern is
that this proposal fails to take into account problems encountered
in animal cloning.
Since the birth of Dolly the sheep (2), successful cloning has been
reported in mice (3), cattle (4), goats (5), and pigs (6, 7), and
enough experience has accumulated to realize the risks. Animal cloning
is inefficient and is likely to remain so for the foreseeable future.
Cloning results in gestational or neonatal developmental failures.
At best, a few percent of the nuclear transfer embryos survive to
birth and, of those, many die within the perinatal period. There is
no reason to believe that the outcomes of attempted human cloning
will be any different. The few cloned ruminants that have survived
to...
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