How many times we ask the Dad how he is doing?
We just assume that he should be okay - though if we think about it, we will realise he is coping with a changed situation. He may have anxiety about finances, his family may be pressuring him to do certain things that he knows will be stressing his wife, he may have had some mental health episodes in the past. Even without any of this, he can have low mood during this period.
Mark Williams and Dr Jane Hanley suggest asking the following questions to the dad
Are you drinking more since your baby has arrived?
How are you feeling now that you are a parent?
Who is supporting you and has your partner has low mood / depression?
What is your sleep pattern like?
Are you gaining weight?
Do you feel you are avoiding situations or difficult conversations more than you used to?
Do you have feelings of anger or aggression?
EPDS is validated for fathers as well and can be used as a screening tool for the fathers.
You can see more information here (Hat tip to Mark Williams)