<p>The incorporation of ‘will’ as a way to define the filiation derived from the use of assisted reproduction techniques (without establishing a new determining method [against the biological and adoptive filiations]), plus the recognition of equal marriage and the consequent access to double maternity/paternity, plus the deficient regulation of the text in the assisted reproduction techniques’ law (art. 7), with a general remission to civil laws, have created a legal loophole that is being incoherently covered; all the jurisprudential decisions and disconnected resolution create (or are creating) a misadjusted situation that should be confronted with an adequate legislative reform. Are the determination, reclamation and i...