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On Tue, 30 Sep 2003 13:10:39 +0930, [EMAIL PROTECTED] (M) wrote: >Hello all, >I was wondering. For embryonic stem cell research, when exactly do the >embryonic stem cells get extracted from the embryo? ie: How many days >after conception can they be extracted, (at the earliest but most >practicable stage)? > >Thanks. > >PS: If there's a more appropriate newsgroup to ask this sort of >question, what is it? m. The free blastocyst is a few days old, with perhaps a thousand cells total. See Carnegie stage 3: http://nmhm.washingtondc.museum/collections/hdac/stage_3.htm
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