Dahlia Lithwick has an article on abortion and father's rights which oddly enough never mentions the obvious solution to this problem: make a legal procedure for men to go through which will annull paternity. There was a great article on this idea a year or two ago in some major publication, but I've forgotten where it is and couldn't find the link through google. The basic idea of the article was that men shouldn't be forced to be father's against their will even if they want to still have sex, and thus there should be a simple legal procedure to annul paternity which takes place in the same time period as abortions. Furthermore to level the playing field you'd have to get this done at a place which also offered abortions. Most of the article consisted of repeating pro-choice arguments with woman replaced with man and medical replaced with legal.

It is kind of odd that women can have sex without having to be responsible for a child for the rest of her life, while men can be forced to provide for this child.