When you are a parent, you love as a parent. There is nothing loving parents would not do to preserve the life of their child. But when a child's life is ended before it begins, parents are often alone to grieve. Grieving is not just feeling sad, it is a specific psychological process by which you become able to cope with loss and reinvest your love in the living. The only way through grief is to give yourself time and allow yourself to work through the pain.
Unhealed grief can lead to depression, discomfort in close relationships and even unexplained anger.
It is important that you acknowledge your grief, and take time to allow yourself to heal. Denying it, trying to minimize it, or escaping it will only leave your emotional recovery unfinished. The amount of grieving a person must do is very individual, and there are both physical and emotional effects. No one should criticize another person's grief. Allow it to unfold without judgement, and it will move itself through the stages.