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08.08.2026
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Embryo Development
Chromosome 8
Structure Of Sperm In The Male Reproductive System
Periventricular nodular heterotopia (PVNH) is a brain development condition where gray matter neurons fail to move to their correct place during early growth.
Instead, they form small clumps or bumps that line the fluid spaces (ventricles) inside the brain. It often leads to seizures starting in the teen years.