12Choosing Hearing, Choosing Deafness: Genetics and Reproductive Ethics

FWhat the genetics now allows

A large share of congenital deafness is genetic, and many of the responsible variants, including the common connexin-26 (GJB2) changes, are now identifiable by a blood or saliva test. This means a couple who know they carry such variants can, in principle, learn during pregnancy whether a fetus is likely to be deaf, or screen embryos created by IVF using preimplantation genetic testing and transfer only those of a chosen hearing status. Technology has turned the hearing or deafness of a future child into something that can be tested for and, increasingly, selected.

It is worth being precise about what selection is and is not. These tools do not change a given embryo or fetus; they choose between possibilities, or inform a decision about whether to continue a pregnancy. The ethical questions are therefore about choosing who comes into existence, which is partly why they feel different from, and to some more troubling than, deciding whether to implant a child who is already born.[2009]

TSelecting against, and selecting for

The mainstream expectation is that testing will be used to select against deafness, and for most prospective parents that aligns with wanting a hearing child. The disability-rights critique pushes back here in the same key as the expressivist objection: a routine drive to screen out deaf children, framed as obvious, can express the message that deaf lives are lesser, and can outrun what we actually know about the rich lives many deaf people lead.

The mirror-image possibility is far rarer but ethically electric: some culturally Deaf parents have expressed a wish to have a deaf child, and have asked whether testing could be used to select for deafness, to share their language and community. Surveys, including of hearing children of Deaf adults, find that even within the community most do not endorse using selection technology in either direction. Philosophers are sharply divided: some argue selecting for deafness wrongs the child by foreclosing options, while others argue that if we accept parents shaping many traits, a consistent respect for reproductive liberty cannot single this one out without begging the question of whether deafness is a harm.[2010][2020][1999]

CThe cases that sparked the debate

The abstract debate became concrete around real families. The widely discussed case of a Deaf American couple who deliberately sought a deaf child, by choosing a sperm donor with a strong family history of deafness, drew intense and polarised commentary, with critics calling it imposing a disability and defenders framing it as continuing a cultural lineage. Around the same period, debate flared over whether laws or clinic policies should permit, or forbid, using preimplantation testing to select for deafness, with some jurisdictions explicitly barring selection in favour of a serious disability.

These cases matter less for their specific verdicts than for what they exposed: that society readily accepts selecting against deafness while recoiling from selecting for it, an asymmetry that forces the underlying question into the open. Is deafness a harm to be avoided, a difference to be accommodated, or a culture to be perpetuated, and who gets to decide on behalf of a child who does not yet exist?[2010][2005]

CAutonomy, rights and the future child

Three values pull against one another. Reproductive autonomy grants prospective parents wide latitude to make intimate decisions about their family. The disability-rights critique warns that selection practices, especially when defaulted and unreflective, can devalue existing disabled people and narrow social tolerance for difference. And the welfare-of-the-future-child principle asks what we owe a person who will live with the consequences of a choice they could not make, often framed through the child’s right to an open future.

There is no consensus resolution, and an honest chapter should not manufacture one. What most commentators do share is a set of process commitments: that genetic counselling be genuinely non-directive and accurate about life as a deaf person rather than only its risks; that the language of cure and tragedy be used cautiously; and that Deaf voices be included in shaping policy. The clinician’s role is not to settle the metaphysics of harm but to ensure families decide with full, balanced information and without coercion in either direction.[2020][1999][2009]