32 weeks: Secondary and tertiary sulci start {brain sulci development}.
32 to 40 weeks: Brain weight increases four times during last two gestation months {brain weight development}. It continues to increase during first infancy months, while making more axons, dendrites, and synapses. After that, neuron number is constant. In fetus, sorting, editing, and removing sense and motor connections depends on maternal-environment external-stimuli timing and spatial arrangement.
4-Zoology-Development-Stages-Gestation
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Date Modified: 2022.0225