A woman dupes a man into getting pregnant, what should he do?

A man has a ual relationship with a woman one time only. The woman ures the man that she is on the pill and does not want children anyway. The man finds out later through a close friend of the woman that she is pregnant and she plans on keeping the child. The man also finds out from the friend that she believes it was a setup to get pregnant. The woman wants the man to be part of the childs life. He is angry about this and does not want to have anything to do with the woman. He feels no attachment to the child. What should he do and what is the moral (not financial) obligation that he has?