A Wrongful Birth? (Published 2006)

Elizabeth Weil article on wrongful-birth lawsuits being brought by parents of severely disabled children against obstetricians whom they accuse of failing to provide kind of prenatal screening and care that would have allowed them to consider having abortions; says lawsuits reflect relatively new belief that people should have right to choose which babies are born; focuses on lawsuit brought by Donna and Anthony Branca of Orangeburg, NY, who won multimillion-dollar settlement set aside for care of a son born with Wolf-Hirschhorn syndrome; photo (L)