Paternity testing is the use of forensic science, biology and genetics theory and technology, from the offspring and the parent's morphology and structure or physiological function of similar characteristics, analysis of genetic characteristics, to determine whether the parent and the child is the parent relationship, is a forensic physical evidence identification of the main components. Simply put, it is to identify the parent-child relationship through blood type or DNA testing, etc. Parentage identification can be done if the parents' blood, hair, saliva, oral cells and bones.
The main reason for paternity testing: with the development of science and technology, coupled with a change in the traditional concept of the family, so that the level of modern biotechnology and demand coincide. As a result of liberalization and people's openness to gender relations, ethical contempt, life's way of life and other changes, leading to many couples are married to worry about whether the child is their own, most of them are husbands who doubt whether the child is biological, but also more than one person before pregnancy has had sexual relations with a person's women, they in order to figure out who the real father of the child, pregnant with the identification is proposed if the parents of the blood, hair, saliva, Oral cells and bones, etc. do not exist can be done to identify the parentage.