Possible threat to health growth

Discuss possible threats to healthy growth and development, and/or, health and well-being at different phases of the lifespan.  Choose at least five (5) of the following phases in the lifespan and discuss major threats to health and well-being.
      fetal development in utero (during a pregnancy)
      infancy 
      early childhood
      middle childhood
      adolescence
      young adulthood
      middle age
      late adulthood