Database provides a rare peek at a human embryo’s first weeks

illustration of different systems of a 9.5 week old baby

SNEAK PEEK At 9.5 weeks of pregnancy, a human embryo is almost 16 millimeters long — about the size of a 1-cent euro coin. A new 3-D tool lets users check out (from left) the embryo’s skin, cardiovascular system and skeleton individually, or combined with all the organs.

B. de Bakker/Academic Medical Center in Amsterdam

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