If the child is the responsibility and the property of the parent, as Roman, Jewish and Christian Law held, it would seem the answer would be the parent.
Remove the component of religion. It’s a human life.
while the child is certainly the responsibility of the parent, he/she is NEVER the property of the parent....can't be bought or sold, can't be mortgaged, can't be neglected, can't and can be a lot of things, but property...not a chance....From the moment of conception, that was a complete human being with his/her own set of rights and the right to life is primary....supercedes all others.