El presente del pasado: El principio mater semper certa est y su reflejo en la actual legislación sobre reproducción humana asistida

This paper presents an analysis of the problematic determination of parentage in Rome and its development until today. Specifically focuses on the evolution of mater semper certa est roman principle attributed to the jurist Paulus and maintenance in today’s society in which revealed two areas of constantly changing as are the family and medicine. The new family models and new techniques of human assisted reproduction condition a new social reality in which cases arise even double-descent maternity unthinkable in Roman times and produce a rethinking of the principle of Paulus.