His legal argument is rather ingenious. He is claiming a constitutional violation of the equal protection clause. That is, we as a society are wholly unwilling to say to women "if you don't want to deal with the responsibilities of having a child, don't have sex" but that is precisely what we say to men. A man has basically zero choices to make after a child is conceived. Whether the child is aborted is a decision given entirely to the mother. If the mother chooses to allow the child to born, she may choose to keep the child and the father is usually given no legal choice but to pay whatever a court determines he should pay. (I write "usually" because I believe after the baby is born, the father could sue for custody, and if he wins, the mother could be forced to pay child support to him. Nevertheless, the presumption is that the baby goes home with the mother automatically. The father gets custody only after an extraordinary intervention by a court.)
So again. I'm against abortion. I'm perfectly ok with society saying to both sexes (to put it bluntly) "You have choice. Don't have sex." But is it a violation of the equal protection clause to say this to men only?