Via the UK Telegraph:

The move, which has outraged Catholics, means only the word “parents” would be used in identical marriage ceremonies for all heterosexual and same-sex couples.

The draft law states that “marriage is a union of two people, of different or the same gender”.

It says all references to “mothers and fathers” in the civil code – which enshrines French law – will be swapped for simply “parents”.

The law would also give equal adoption rights to homosexual and heterosexual couples.

Justice Minister Christiane Taubira told France’s Catholic newspaper La Croix: “Who is to say that a heterosexual couple will bring a child up better than a homosexual couple, that they will guarantee the best conditions for the child’s development?”

Last I checked, and my science may yet be a little rusty these days, it doesn’t matter how a child is conceived, you still need a mother and father and their respective cells to create a life.  No?  So the terminology is still viable.

If a gay couple raises a child, then they are the parents. But that child still has one mother and one father, no matter who raises them.