The underlying causes (internal) of death.. congenital or due to the rapid change in the functional structure of the body of malignant tumors and diseases of the blood circulatory system causes

It is mostly due to the biological congenital or due to the rapid change in the functional structure of the body and are considered the causes of the factors leading to the death of infants in the first days of their lives as well as malignant tumors and diseases of the blood circulatory system within these underlying causes.