Expectant mothers can reduce the impact of marijuana on foetal brain development with an essential micronutrient choline suggests a study. The findings of the study published in 'Psychological Medicine' are critical because marijuana's use can negatively impact foetal brain development and early childhood behaviour. In the study we found that maternal marijuana use begins to negatively impact the foetal brain at an earlier stage in pregnancy than we expected. However we also found that eating choline-rich foods or taking choline as a supplement may protect the child from potential harm said Camille Hoffman University of Colorado School of Medicine. Fifteen