Mater semper certa est

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Mater semper certa est is an old Roman law principle, which has the power of presumptio iuris et de iure, meaning that no counter evidence can be made against this principle. The meaning of this principle is that the mother of the child is always known. Since 1987, when the first child conceived by the technique of in vitro fertilization cannot any longer be applied because the child has both a genetic (biological) and a carrying/nurturing (natural) mother.

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