1. The family as a married couple with no children.
2. Childbearing families with children up to 30 months of age.
3. Families with preschool children.
4. School-aged children, 6 through 13 years old.
5. Families with teenagers.
6. Families assisting their young adults out into the world.
7. Empty nest couples
8. Old age couples from retirement to death. (Grand Canyon University [GCU], 2011, para. 6) System theory views “the family is viewed as a whole unit through which the action of each member influences the others” (Grand Canyon University, 2011, para. 8). This theory is less appealing to me because the nurse has to assess the family as a whole instead of only the individual.