Herman C. Hanko is professor of Church History and New Testament in the Protestant Reformed Seminary. In our last article we concluded a discussion of various medical means which have been employed to enable childless couples to have children. A few other scientific techniques, techniques which we have not yet discussed, are so closely connected with this subject that they should be at least briefly addressed in connection with our broader subject. Four such subjects have often been treated by ethicists as they ponder the problems which advances in medical science have created. These four are: frozen embryos, sex selection,...