 A third objection focuses more narrowly on the rights-based approach. According to that objection, if the child has the right not to be brought into an existence of a certain sort, it is plausible that the child’s parents have various rights as well. Thus, the couple who opts to produce a child with Huntington’s disease or hereditary deafness in place of a relatively unimpaired child may be simply exercising their right of procreative liberty. They may, that is, be using their gametes and their labor, as a matter of right, in a way that suits them. We quickly see that the offspring’s rights and the couple’s rights cannot both be respected – a fact that raises the concern that the underlying account of rights may be inconsistent (Persson 2009).