Clinical depression is a mood disorder that causes persistent feelings of being sad and losing interest in things. (petesgrillandpizza.com)
One of the most common side effects of low iron is a lack of energy and persistent feelings of fatigue. (globalhealingcenter.com)
It is characterized by persistent feelings of sadness and hopelessness, and sometimes thoughts of harming oneself or the child, according to the Canadian Mental Health Association. (huffingtonpost.ca)