“Over 100 genes linked to increased risk of schizophrenia appear to cause illness through the roles they play in the placenta, rather than in brain development directly, according to a team at Johns Hopkins’ Lieber Institute for Brain Development (LIBD) and the Icahn School of Medicine.”
“Schizophrenia is estimated to affect 1% of the world’s population, and men are more likely to develop it, with onset generally occurring late in childhood or in early adulthood. It is also significantly heritable, the researchers note, with a heritability of about 50-80%.”