He also cites studies that show a strong correlation between parental happiness / depression and child happiness / depression, emphasizing the importance that parents apply these same strategies to their own lives. (positive-parenting-ally.com)
Although the underlying mechanisms of these advantages for boys are not clear, it is plausible that greater marital stability and parental happiness decrease parental stress in families with sons. (journals.plos.org)
This truth about parental happiness is surely known by any loving parent who has been compelled to watch impotently while his child is suffering. (firstthings.com)