No, sir, not my baby
In a story so nutty it's gone worldwide, a Michigan man seeks to avoid child support because his ex told him she was infertile. Our *cough* distinguished colleagues over at the National Center for Men are, of course, providing assistance to this fellow.
Of course I don't condone lying to one's partner. But unless he managed to not be present while having sex with her, I think the child support decision has to be upheld. Reproductive rights come with reproductive responsibilities, dude. If you didn't wear a condom, then don't go crying to the courts.