LETTER : The human 'whole' begins at fertilization

Your support helps us to tell the story

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.

At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.

Your support makes all the difference.

From Fr David A. Jones, OP and

Dr Pita Enriquez Harris

Sir: It is nave to think that Catholic teaching on such matters as embryo experimentation is wrong, because it is based on ignorance of biology. Those who consider and formulate the teaching are themselves informed by many physicians and embryologists. They are not ignorant of biology.

John Habgood says (20 April) that in biology "one thing merges into another" and that biological change is always "gradual". Yet it remains that you are a genetically distinct biological individual from your mother - and were so even in the womb. The development of an embryo is gradual and continuous but fertilisation represents in some sense a discontinuity in that it signals the creation of a new biological entity.

Dr Habgood suggests that there might not even be a "mere probability" that a human embryo is a human being. Perhaps here he refers to those rare tumours which can arise from genetically doomed fertilised eggs. Such structures are not human simply by virtue of the fact that at no point did they possess the necessary genetic instructions to continue on this developmental path. Or perhaps he refers to miscarried foetuses. One might as well argue that someone who dies in childhood is a different species from someone who becomes an adult.

It is true that some of the cells in the embryo develop into the placenta and other structures, but these are still structures of the developing embryo (organs we need only in the womb).

The real disagreements here are not about facts, but interpretation, not about science but philosophy.

Yours sincerely,

DAVID A. JONES

(Blackfriars,

Oxford)

PITA ENRIQUEZ HARRIS

(Department of Biochemistry

University of Oxford)

Oxford

21 April

Join our commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in