Lead can harm mental and physical development even in babies before they are born.

VOA: special.2009.06.09

Doctor Spock's book discusses the mental and emotional development of children.

VOA: special.2009.03.15

so what do we expect? So we kept putting ourselves in audience seats for me the mental and emotional aspects and development of Tony were, to me,a lot more it's strange to say 'personal,' because it is not necessarily relating to my life;

VOA: standard.2010.05.19