It may be conforting to think a mood disorder is not biologically inherited, but statistics suggest it is at least as easy to inherit as any other tendency. I got high triglicerides from my Mom's family and depression from my Dad's. I got my cheerful disposition from my mother's father and intellect from Dad's family. Mom had Asthma and so do I. Why shoulc depression be different? I got treatment for my asthma decades earlier with better chemicals, so I won't die from it like mom. I gotthe mchemicalsbecause Iwas alert tothe tendency and reorted minor symptoms to my doctors.