Article 342-13 of the French Civil Code
Any person who, having consented to medically assisted procreation, does not recognise the resulting child is liable to both the mother and the child. In addition, his paternity is judicially declared. The action is governed by the provisions of articles 328 and 331. A woman who, after consenting to medically assisted procreation, obstructs the delivery to the civil registrar of the joint acknowledgement referred to in Article 342-10 incurs liability….