Researchers at Tohoku University's School of Medicine have found an explanation for the correlation between eating fish during pregnancy, and the health of the baby's brain.Dietary lipid contains fatty acids such as omega-6 and omega-3, which are essential nutrients for many animals and humans. The research group, led by Professor Noriko Osumi, found that a balanced intake of lipids by pregnant women is necessary for the normal brain formation of the unborn child.