We have written this book because men have not been well-represented in the parental mental health movement. While we have advanced our understanding of maternal mental health, the field, as a whole, has failed to include their partners. We are feminists and see men and women as equals, while acknowledging key differences. The purpose of this book is to include men in the discussion about early parenthood, to foster a gender-equitable, whole-family approach to parental mental health, and to increase awareness about best practices in the care for expectant and new fathers.