The symptoms of PPD are: sadness, hopelessness, low self-esteem, guilt, a feeling of being overwhelmed, sleep and eating disturbances, inability to be comforted, exhaustion, emptiness, anhedonia (inability to experience pleasure), social withdrawal, low or no energy, becoming easily frustrated, feeling inadequate in taking care of the baby, impaired speech and writing, spells of anger towards others, increased anxiety or panic attacks, and a low sex drive. Note that not all of these symptoms need to be present. Postpartum depression does not just "go away."
What you're thinking of there is maternity blues, which is a temporary condition and not related. Maternity blues can last a few hours to a few days. If you think your friend is suffering from PPD, you should encourage her to seek treatment, and as soon as you can, because a mother with PPD can have a negative long term effect on a child.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.