Anticipatory grief
The five stages namely, denial, anger, bargaining, depression, and acceptance proposed by Elisabeth Kübler-Ross in her model of grief describe the process by which people undergo after a loss. Anxiety, dread, guilt, helplessness, hopelessness, and feelings of being overwhelmed are also common. However, it is important to note that anticipatory grief is not simply normal grief begun earlier.
Kübler-Ross model
George Bonanno, Professor of Clinical Psychology at Columbia University, in his book "The Other Side of Sadness: What the New Science of Bereavement Tells Us About Life After a Loss", summarizes peer-reviewed research based on thousands of subjects over two decades and concludes that a natural psychological resilience is a principal component of grief and that there are no stages of grief to pass. Bonanno's work has also demonstrated that absence of grief or trauma symptoms is a healthy outcome.