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At 10 weeks

Do you know that at 10 weeks you developed fingerprints - which will never change throughout your whole life, they are unique to you.  Also around this time you developed fingernails

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January 2, 2015

Eight-cell human embryo

Photo credit: Wellcome Images

Keywords: Embryo, early human life

The embryo has undergone three cycles of cell division to get to this stage and the cells have not yet undergone compaction as they are still rounded. The embryo is still surrounded by the zona pellucida, the tough outer membrane. http://wellcomeimages.org/ixbin/hixclient.exe?MIROPAC=B0000021

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