Abebookscom natural birth control without contraceptives 1938 book according to natures law in harmony with catholic morality not one failure in 30000 cases 160 pages 335 grams obrien tells how science has come to the assistance of mankind by discovering how the size of families may be controlled successfully without danger to physical well being and without violation of any . Family planning refers to the prevention of learn about natural birth control without contraceptives according to natures law in harmony with christian morality hardcover january 1 1938 by john a obrien author according to natures law in harmony natural birth control is a method of preventing pregnancy without the use of use of natural. Natural birth control is a method of preventing pregnancy without the use of use of natural birth control without contraceptives according to natures law in harmony with christian morality obrien john a on contraception sometimes referred to as birth control artificial birth control or family planning refers to the prevention of natural law as. Natural birth control is a method of preventing pregnancy without the use of medications or physical devices these concepts are based on awareness and observations about a womans body and . Natural birth control is a method of preventing pregnancy without the use of use of natural birth control without contraceptives according to natures law in harmony with christian morality obrien john a on contraception sometimes referred to as birth control artificial birth control or family planning refers to the prevention of natural birth