Just to give some information on this condition. It is possible for dads to go through postpartum depression. This condition is called Paternal Postnatal Depression (PPND).
It could be caused by hormonal changes. Men’s hormones go through changes during the pregnancy as well, their testosterone level decreases while estrogen level increases. These changes will cause some men to be more susceptible to depression after the birth of their newborn. It could also be caused by the added stress and anxiety.
Take a look at this article to understand more about the condition:
http://www.parents.com/parenting/dads/sad-dads/
I believe knowing the symptoms and talking to family and friends would help. It is best to recommend professional help if you notice any of your friends displaying any symptoms.
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