 The United States Catechism for Adults devotes a section to in vitro fertilization , stem @-@ cell research and cloning in its explanation of the fifth commandment , because these often involve the destruction of human embryos , considered to be a gravely sinful form of murder . Embryonic stem cell research is called " an immoral means to a good end " and " morally unacceptable . " Citing the Congregation for the Doctrine of the Faith 's Instruction on Respect for Human Life in its Origin and on the Dignity of Procreation , the US Bishops quote : " No objective , even though noble in itself , such as a foreseeable advantage to science , to other human beings , or to society , can in any way justify experimentation on living human embryos or fetuses , whether viable or not , either inside or outside the mother 's body . " The Bishops note that adult stem cell research , using cells obtained with informed consent , is a promising field of research that is morally acceptable . 
 The United States Catechism for Adults <a href='uninflect' title='1'><mark>devotes</mark></a> a section to in vitro fertilization , stem @-@ cell research and cloning in its explanation of the fifth commandment , because these often involve the destruction of human embryos , considered to be a gravely sinful form of murder . Embryonic stem cell research is called " an immoral <a href='uninflect' title='2'><mark>means</mark></a> to a good end " and " morally unacceptable . " Citing the Congregation for the Doctrine of the Faith <a href='null_genetive' title='3'><mark>'s</mark></a>Instruction on Respect for Human Life in its Origin and on the Dignity of Procreation , the US Bishops quote : " No objective , even though noble in itself , such as a foreseeable advantage to science , to other human beings , or to society , can in any way justify experimentation on living human embryos or fetuses , whether viable or not , either inside or outside the mother <a href='null_genetive' title='4'><mark>'s</mark></a>body . " The Bishops note that adult stem cell research , using cells obtained with informed consent , is a promising field of research <a href='null_relcl' title='5'><mark>that</mark></a><a href='drop_aux' title='6'><mark>is</mark></a>morally acceptable . 
Da United States Catechism for Adults devote a section to in vitro fertilization , stem @-@ cell research and cloning in its explanation of the fifth commandment , cuz these often involve tdadestruction of human embryos , considered to be a gravely sinful form of murder . Embryonic stem cell research is called " an immoral mean to a good end " and " morally unacceptable . " Citing thdaongregation for thedactrine of the Faith  Instruction on Respect fa Human Life in its Origin and on the Dignity of Procreation , the daBishops quote : " No objective , even though noble in itself , such as a foreseeable advantage to science , to other human beings , or to society , can in any way justify experimentation on living human embryos or fetuses , whether viable or not , either inside or outside the mother  body . " The Bdaops note that adult stem cell research , using cells obtained with informed consent , is a promising field of research morally acceptable .