Here we can see that the brain and spinal cord of this fetus have developed to the point of allowing it to generate robust movements (you can even see the cortex and spinal cord). And of course, the fetus is attached directly to the mother via the umbilical cord to receive nutrients."
"What is less obvious, however, is that hormones and other factors that powerfully impact brain development are constantly being passed from the mother to the fetus through the umbilical cord and the placenta, which is an endocrine organ. These include hormones that impact sexual differentiation of the brain and body, neurotransmitters that set the reactivity and temperament of the baby, and immune factors that ensure a responsive defense system.
Of course, environmental factors after birth modify these influences too, but from very early on, the template is being established, and it arrives directly via the mother."
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📝 and 🎥 courtesy via hubermanlab
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