5 st weeks of pregnancy: organ development

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EFELYA With more than 25 experienced practitioners.

The nostrils become visible, the retinas start to form, the buds of the arms and legs grow. The morphology of the heart becomes more complex. The four chambers of the heart and their valves begin to form. But during this week, it is above all the cortex, the future brain, that develops with the appearance of the two hemispheres and the grey matter.