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Body & Brain

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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.

mouse microglia

GUT IMPULSE Signals from gut microbes can activate immune cells called microglia (shown here in green) in the mouse brain, causing inflammation that’s characteristic of Parkinson’s disease.

needle with spindle and egg

BATTERY SWAP A technique to suck a chromosome-containing structure called the spindle (white, in needle) out of a mother’s egg and place it in a donor egg emptied of its chromosomes but with healthy mitochondria can help prevent mitochondrial diseases.

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