© 2016 MA Healthcare Ltd. Over the past 3 decades, there has been a growing awareness and concern about the burden of ill health experienced by men, and research has shown that fatherhood has a protective effect on men's health. However, there is also evidence that the transition to fatherhood can be complex and demanding, with many fathers feeling inadequately equipped as they begin their journey. This can cause distress, anxiety and increased risk of depression. With a prevalence of approximately 10%, paternal postnatal depression (PPND) is a real and significant public health issue. However, PPND is not widely acknowledged nor well researched. In general, the mental health of fathers in the postnatal period is often not considered. This has resulted in men being underscreened, underdiagnosed and undertreated for PPND and other postnatal mental health problems. The need to address the problem is highlighted by the detrimental effects that PPND can have on a father's health, as well as the numerous potential negative effects on the health and wellbeing of the woman and child. Key findings from research undertaken in relation to PPND have identified maternal depression, poor social support and a lack of education as contributing factors.