If a woman does not want to support a child, she can choose to have an abortion. Of course, the would-be father ultimately has no say in this decision (he cannot force or prevent an abortion). Presumably, the asymmetry here relates to the fact that pregnancy and childbirth burden the mother to an infinitely greater extent than the father. What I don't understand, though, is why fathers may be forced to support (monetarily) children which they didn't want. If a woman decides to have a child in spite of her partner's disagreement, shouldn't she also assume full responsibility for that child? It seems as though the man has no say at all here. If the man wants the child, the woman may nevertheless abort; if he doesn't want the child (but she does), he nevertheless must support it.