Child's right to know its own origin is a part of its family rights, but it is also a part of its private life. It is a well-known fact that child is naturally dependent on its family, i.e. family's members. That results in child having most rights tied to its family, more precisely its members, but especially its parents. In the Republic of Croatia, determining child's origin is regulated with the Family Act which specifies that the determining of origin is conducted on request or ex oficio. A person who wants to dispute motherhood or fatherhood doesn't have to be sure of the fact that they are not the mother or father of the child, suspicion is enough. Furthermore, a person who wants to dispute motherhood or fatherhood doesn't have to be ruled out of motherhood or fatherhood by medical analysis, more precisely DNA analysis, as one of the possible medical analyses. The result of DNA analysis is considered a fundamental evidence in a great number of both civil and criminal cases that are resloved in courts. Although this kind of analysis can undoubtedly determine the identity of a person or biological trace, DNA analysis is not omnipotent, so great knowledge and experience is needed for proper interpretation of laboratory results. The role of parents in child's life is double-natured because it manifests in socialization and individualization, therefore it is desirable, but also needed, that child knows from whom it originates.