Is there a third type of filiation in Spain besides a biological and an adoptive one?

Di Bruno Rodríguez-Rosado -

This article addresses a reality that, in some way, is emerging, and whose existence can hardly be perceived in legal texts, but which has gained importance in the case law. Relying on certain legal precedents, especially in the Spanish Assisted Reproduction Techniques Act, which attribute double motherhood without biological filiation, two decisions of the Spanish Supreme Court have understood that possession of status may be sufficient to attribute motherhood to the person acting as such. If we add other judgments of the Supreme Court, we find that in Spanish law is arising a third type of filiation besides the biological and the adoptive one.