A new study has shown that men are just as likely as their partners to get postnatal depression.
One in ten fathers are suffering before or straight after the birth, and by the time the child is 12 weeks old, up to one in four men are depressed.
Apparently it's not hormonal, like it is for women, but is brought about by the pressures of being a father.
The combination of money worries, relationship issues and the huge responsibility of having a child means many fathers struggle to cope.
Mental health experts say the lack of sleep and having to help around the house more in the first few weeks also have an effect.
The Daily Mail reports that the study showed the overall rate of depression among new fathers was 10.4% - double the normal rate.
They found depression was "catching" with parents more likely to be affected if their partner was too.
Most women suffer from the "baby blues" shortly after birth, but this is different from postnatal depression, which can start at any time in the first six months or so.
Around one in ten women gets postnatal depression, and it can occur even if there have been no previous mental health problems.
The Mail reports that Dr Paulson said paternal depression was serious because it can have "substantial emotional, behavioural and developmental effects on children".
For men, and women, it's important to get treatment for the condition otherwise it can last for many months and have serious consequences.
Did you or your partner suffer from post-natal depression? How did you cope with it?
Source: Daily Mail