Introduction / Thomas D. Roberts S.J. -- Conscience and contraception / Stanley E. Kutz C.S.B. -- Procreation and the person / Kieran Conley O.S.B. -- Birth control and the ideals of marital sexualilty / Rosemary Ruether -- The lessons of biology / Julian Pleasants -- The lessons of zoology / Elizabeth A. Daugherty -- Responsible parenthood and the population dilemma / William V. D'Antonio -- Contraception and the philosophy of process / E.R. Baltazar -- On discovering natural law / Justus George Lawler -- Casti connubii and the development of dogma / Leslie Dewart -- Can the Church change her position on birth control? / Gregory Baum O.S.A.