 Another classic case from Parfit focuses on the simple fact that the egg cell a young girl will produce soon after she becomes capable of conceiving a child will not be the same egg cell as the one she will produce a decade or more later. “This girl chooses to have a child” (Parfit 1987, 358). We think that it would have been better for the girl to wait “for several years” to have a child and that, barring exceptional circumstances, what the girl has in fact done is wrong (Parfit 1987, 358). We also think that the reason her choice is wrong is that it causes the child the girl bears to be given a “bad start in life” (Parfit 1987, 358). On closer inspection, however, we see that that particular child could not have existed at all had the girl waited until she was older to have a child. Given that the child’s life is worth living – given, that is, that it would not have been better for the child that he or she never have existed at all – it seems that the child has not been harmed, or made worse off, by what the girl has done, and that there exists no plausible basis for the position that her act is “bad for” the child.