Discussion post on Cheryl Tatano Beck: Postpartum Depression Theory please see instructions below

Select a nursing theory on  Cheryl Tatano Beck: Postpartum Depression Theory 

Briefly describe the main concept of the theory, including major concepts with definitions and major assumptions. 

In your own words, analyze the theory using Chinn and Kramer's steps: clarity, simplicity, generality, accessibility, and importance. 

Include the reference and brief summary of a recent research article published within the past 5 years that includes the use of this theory.

APA format references with in the last past 5 years