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Do they have to be human ova ?

Quoting Jim Slattery <[log in to unmask]>:

> BlankThe process of growing stem cells, either embryonic or adult, involves
> the 
> use of a female ovum (egg). There is a natural limit to the use of these 
> methods,the question of supply. For example, to cure the estimated 100,000 
> persons with PD in Australia alone, would call for 100,000 donated eggs.
> Since 
> it is never certain that the process will deliver viable cells each time, the
> 
> actual number required would be more than this.
> 
> I feel that the cloning of the person's own somatic (body cells, e.g., skin)
> is 
> the more viable option, as well as solving some of the ethical quandaries.
> Jim 
> 
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