Human Fertilisation and Embryology (Mitochondrial Donation) Regulations 2015

Debate between Lord Winston and Baroness Scotland of Asthal

Tuesday 24th February 2015 Lords Chamber

[Lord Winston]

My Lords, I declare an interest in that it was my scientific group which started pre-implantation diagnosis—the first attempts to diagnose genetic diseases in embryos in families who have these fatal, sad genetic flaws in them. I congratulate the Minister on his absolutely balanced and fair speech. From time to time, we have not agreed, but I think that his care, compassion and courtesy are deeply appreciated by the whole House. I also congratulate the noble Lord, Lord Deben, on his very clever speech. I do not agree with what he said and I hope that, at other times, we can see why we disagree. I accept that he is talking with deep conviction, but I think that we have already sorted out most of his objections, both the legal and the difficulties of side-effects.

[Baroness Scotland of Asthal (Lab)]

My Lords, before my noble friend goes any further, I say to him that there are real differences in legal opinion. I do not think that we have quite sorted them out yet.

[Lord Winston]

I am very grateful to my noble and learned friend for that.

I want to do something which I have done previously in debates of this kind, which is to talk from personal experience. I may be one of the few people in the House who have sat with an endless number of parents who have a genetic disease in the family, have listened to their problems and have seen the kind of dilemma that they face. I am reminded of the child Jeremy “Martinez”—forgive me if I change the surname, but I do not have approval to give the surname of that patient from some time ago. We were doing in vitro fertilisation and pre-implantation genetic diagnosis in the 1980s, and the first babies, who are now 25, were born in 1990. At that time, we were looking at the very common genetic disorders. It is interesting to consider that there is a vast number—too many, some of us think—of Members of this House. At least 40 of you, on mathematical probability, will carry the fatal genetic mutation for cystic fibrosis. That is very common indeed and much more common than the problem with mitochondrial disease, even though we are beginning to see that it is becoming rather more common as we get better molecular techniques.

What is very clear, and it is very important because it has not been stated, is that the number of families who will be of child-bearing age when a mitochondrial disease is diagnosed will be very few. That is important because we are not talking about a large number of people; we are talking about a small number, but they have a definite problem for which they need some desperate solution. They are prepared to do whatever they think is best for their families, with informed consent.

In the case of Jeremy, he was a bit slow to grow, but by nine months he could not lift his head. He started to vomit; he had diarrhoea; he then progressively developed muscular weakness and started to get epileptic fits. These fits would often go on all night; this child screamed with pain and was uncontrollable; eventually, having gone both blind and deaf, with severe mental problems with his brain, he died at the age of two. There was no treatment. His mother came to see me to ask if there was any possibility that she might have some screening of her embryos in the future. This was in 1989. Certainly, Alan Handyside and I had discussed the possibility of looking at mitochondrial disease, but we did not have the molecular techniques at that time to have any chance of being able to screen an embryo. It is true that that screening has now happened and can be done; indeed, there is a very interesting report from Newcastle University showing how that can be done in some cases. However, it is not always satisfactory, for the reasons that the noble Lord, Lord Patel, stated.