What Judgment Should Be Made on Other Procedures of Manipulating Embryos Connected with the “Techniques of Human Reproduction”?
Techniques of fertilization in vitro can open the way to other forms of biological and genetic manipulation of human embryos, such as attempts or plans for fertilization between human and animal gametes and the gestation of human embryos in the uterus of animals, or the hypothesis or project of constructing artificial uteruses for the human embryo. These procedures are contrary to the human dignity proper to the embryo, and at the same time they are contrary to the right of every person to be conceived and to be born within marriage and from marriage.(32) Also, attempts or hypotheses for obtaining a human being without any connection with sexuality through “twin fission”, cloning or parthenogenesis are to be considered contrary to the moral law, since they are in opposition to the dignity both of human procreation and of the conjugal union. The freezing of embryos, even when carried out in order to preserve the life of an embryo – cryopreservation – constitutes an offence against the r
