With a book by Sybille Pearson, music by David Shire, and lyrics by Richard Maltby, Jr., Baby follows three couples on a university campus dealing with the painful, rewarding and unexpectedly funny consequences of the universal experience of pregnancy and parenthood. The couples include two college students, barely at the beginning of their adult lives; the thirty-somethings, having trouble conceiving but determined not to give up; and middle-aged parents, previously looking forward to an empty nest when an unexpected night of passion lands them back where they started.