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New U.S. embryo screening firm raises specter of ‘designer babies’

June 10, 2025 Catholic News Agency 0
null / Credit: Tati9/Shutterstock

CNA Staff, Jun 10, 2025 / 15:51 pm (CNA).

A U.S.-based biotech company has announced the launch of Nucleus Embryo, a company that screens human embryos for desired genetic profiles, a practice the Catholic Church teaches violates human dignity and contributes to a eugenic mentality. 

People undergoing in vitro fertilization (IVF) will be able to screen up to 20 embryos for over 900 conditions and traits, including health risks, intelligence, and physical characteristics like height and eye color, in order to “optimize” their embryos, according to Kian Sadeghi, founder of Nucleus Genomics, parent company of Nucleus Embryo.

“I see a world where sequencing, analyzing, and editing DNA merge seamlessly to create a truly preventative health care system,” the 25-year-old Sadeghi said on the company’s website, adding: “Every parent wants to give their children more than they had. For the first time in human history, Nucleus adds a new tool to that commitment.”

Embryos that meet parental desires will be eligible for implanting, and undesirable ones will be discarded.

While the Catholic Church teaches that IVF is morally illicit because it completely separates procreation from the marital act and violates the dignity of the child, the Church also condemns preimplantation diagnosis as “shameful and utterly reprehensible,” an “expression of a eugenic mentality” that leads to the destruction of innocent human life.

Published by the Dicastery for the Doctrine of the Faith, the 2008 document Dignitatis Personae affirms that the human embryo cannot be treated as “mere laboratory material” because this violates its dignity, which “belongs equally to every single human being, irrespective of his parents’ desires, his social condition, educational formation, or level of physical development.”

The document explicitly condemns preimplantation diagnosis and resulting genetic enhancements because they can result in the killing of human embryos “affected by various types of anomalies,” and they “presume to measure the value of a human life only within the parameters of ‘normality’ and physical well-being, thus opening the way to legitimizing infanticide and euthanasia.”

Such procedures could also marginalize individuals, widen societal divides, and “harm peaceful coexistence among individuals,” the dicastery stated.  

The document questioned who would establish which gene edits were worthwhile and which were not, and what limits, if any, should be placed on genetic enhancements “since it would be materially impossible to fulfill the wishes of every single person.”

In the end, the common good will be harmed by “favoring the will of some over the freedom of others.”

National Catholic Bioethics Center senior ethicist Father Tad Pacholczyk told CNA that “couples will now be tempted to impose quality control and eugenics onto their vulnerable and voiceless children.”

Nucleus Embryo’s website emphasizes genetic manipulation of embryos before implantation and states: “The best time to prevent disease is pre-pregnancy. Knowing what you could pass on to your kids lets you plan with clarity and avoid future surprises.”

National Catholic Bioethics Center senior ethicist Father Tad Pacholczyk. Credit: "The World Over with Raymond Arroyo/Screenshot
National Catholic Bioethics Center senior ethicist Father Tad Pacholczyk. Credit: “The World Over with Raymond Arroyo/Screenshot

This is a “‘command and control’ mentality over procreation,” Pacholczyk said, which allows people to treat their “own offspring like raw material … It’s tragic when our children become a mere abstraction, pawns to be played in the end game of seeking what we want.”

“Society’s demand for physical perfection places untold pressure on couples today to ‘conform to the norm’ by aborting or otherwise eliminating any less-than-perfect children,” he continued.

“Human embryos, among the most vulnerable of God’s creatures, have been entrusted to us to be received unconditionally and lovingly by all parents, without demanding that they run any gauntlet of prenatal screening. Every child, exactly as he or she arrives into our families, is precious, good, and beautiful.”

Pacholczyk said not every use of prenatal diagnostic information is morally unacceptable, however. 

Diagnostic information that “assists in the treatment of an in-utero patient represents a morally praiseworthy use of this powerful technology.”

For example, a life-threatening disease known as Krabbe’s leukodystrophy can be treated through a bone marrow transplant immediately following a child’s birth. If the disease is diagnosed prenatally, the parents can look for matching bone marrow before the child is born. Certain other diseases, such as spina bifida, can also be surgically treated prenatally.

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