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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To be disturbed by wilfull ignorance around genetic inbreeding?

772 replies

M9009 · 26/01/2026 19:41

I've come from a country were cousin marriage and indeed marriage to any close relative if illegal.
I've recently started working in a dialysis unit and I'm so disturbed by how many parents are young children born of first cousin marriage. Usually from South Asian backgrounds.
Today I was speaking to one parents who has 9 children, all in need of kidney transplants. The eldest 2 have already had theirs. Parents are first degree cousins and each have various medical problems of their own.
Why, as a society, do we allow these marriages? It seems so cruel to the children who are born with medical and genetic problems.
Maybe I'm easily shocked, I don't know.

OP posts:
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16
Carla786 · 27/01/2026 02:40

Genevieva · 26/01/2026 21:17

Yes - it was more of an English version of the set up you see in A Suitable Boy by Vikram Seth. People usually married within their own social class and approximate wealth distribution. With small social circles, this meant that everyone was part of a complex web of distant relatives anyway. So it wasn’t cousin marriage by design, and first cousin marriages were rare but acceptable. They didn’t happen in successive generations either, so harm was limited.

I love A Suitable Boy - good parallel, I think Vikram Seth has said he's a Jane Austen fan.

Sparklybutold · 27/01/2026 02:41

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Carla786 · 27/01/2026 02:42

Isthismykarma · 26/01/2026 21:24

A family member of mine is a social worker in Bradford. It shouldn’t be banned because the cousin marriages will still happen but they will be religious marriages and not legal. The problem won’t go away and women will have fewer rights.

This is a good point...

Carla786 · 27/01/2026 02:43

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Agree

Carla786 · 27/01/2026 02:45

Parcell · 26/01/2026 21:28

Is it a few defined genetic diseases or just a load of random ones? If the former maybe genetic testing like certain Jewish communities might be the way to go?

My aunt unknowingly married her 4th cousin. Her first child died after a long illness of an almost unknown disease, 3 cases in Europe at the time. Took them a couple of years to work out what it was. This was about 50 years ago, before genetic testing etc. The fact that we can now screen, makes it worse.

Ashkhenazi Jews, esp the strictest Haredi Jews who marry only in-community are more prone to things like Tay-Sachs. Jewish law did traditionally promote cousin marriage and even uncle-niece marriage but this was phased out long ago, and other religions must do the same. Testing works but people generally aren't marrying first cousins in the first place

NewGirlInTown · 27/01/2026 02:46

This is destroying our NHS as these people are taking a disproportionate share of resources and it is getting worse and worse. This links with the hideous abuse of women and girls in these communities where young girls are ‘married off’ within families at revoltingly young ages.

Carla786 · 27/01/2026 02:47

Simplelobsterhat · 26/01/2026 21:02

Yes I was just thinking about Jane Austen as one of the reasons I thought it had been quite common in the past! At no point is it implied Edmund and fanny are doing anything weird by getting married (even though I get ick grooming vibes from it in hindsight!)

In the first part of the book it is argued that Fanny can't marry a cousin because they're being raised 'always together, like brothers and sisters'. But that's because of her being raised in the family, not simply due to them being first cousins

Carla786 · 27/01/2026 02:48

SpanThatWorld · 26/01/2026 21:12

Spain had a far higher rate of first cousin marriage than the rest of Europe right through the 20th century which is surprising if Catholic laws prohibit it.

That is really odd...

GarlicSound · 27/01/2026 02:49

TorridAntelope · 26/01/2026 20:13

Not sure if you missed it but the NHS literally issued guidance about how great cousin marriage is for fostering family relations.

And withdrew it, saying it should never have been published.

Carla786 · 27/01/2026 02:53

Simplelobsterhat · 26/01/2026 21:02

Yes I was just thinking about Jane Austen as one of the reasons I thought it had been quite common in the past! At no point is it implied Edmund and fanny are doing anything weird by getting married (even though I get ick grooming vibes from it in hindsight!)

Yep, Edmund doesn't groom her, but he's 16 and meets her when she's 10. Emma is worse since Emma has known Mr Knightley since she's a baby, and he tells her at the end that he was in love with her 'ever since you were 13 at least'. 🤢
Or look at Dickens novels like Bleak House where it's seen as fine for Esther to potentially marry her guardian when she comes of age!

So many examples of 19th century novels aren't good guides for now!

Carla786 · 27/01/2026 02:54

Waitingforthesunnydays · 26/01/2026 21:01

Can I ask why she married her cousin if she wasn’t from a culture that it’s common in? Was he just that irresistible?!

My question too!

Carla786 · 27/01/2026 02:56

AskingQuestionsAllTheTime · 26/01/2026 20:58

I think first-cousin marriage happened in Jane Austen's Mansfield Park. It was strongly suggested and even advocated within the book but didn't in the end happen, in Pride and Prejudice and in Persuasion.

Jane's brother Harry married their first cousin.

Mr Collins is I think a more distant cousin than a first cousin, but still a relative..

Carla786 · 27/01/2026 02:58

Alltheyellowbirds · 26/01/2026 20:46

Three, seriously? I feel I’ve been living under a rock, I had no idea this happened.

I can understand though that if you didn’t grow up knowing your cousin you might not feel the same revulsion to the idea that you would if you grew up with them being close family.

Agree with this...

Carla786 · 27/01/2026 03:02

SpanThatWorld · 26/01/2026 20:51

Indeed.

If there is cystic fibrosis in your family ... or inheritable deafness ... or spinal muscular atrophy ... or diabetes ...

Yes...

CrocsNotDocs · 27/01/2026 03:08

Putting aside genetic issues, cousin marriage has huge social issues too. With the grooming gangs, the girls were brought to family homes. The women would have known what was happening and remained silent. Thousands of them. This silence is more understandable when you realise that the women in these houses had to contend with their husband’s families being their blood family too. To turn in your husband, you would be nuking your family and would have your grandparents, parent and aunts and uncles fall on you like a ton of bricks. You couldn’t turn in your husband and cut off his family because it’s your blood family too.

Carla786 · 27/01/2026 03:15

CrocsNotDocs · 27/01/2026 03:08

Putting aside genetic issues, cousin marriage has huge social issues too. With the grooming gangs, the girls were brought to family homes. The women would have known what was happening and remained silent. Thousands of them. This silence is more understandable when you realise that the women in these houses had to contend with their husband’s families being their blood family too. To turn in your husband, you would be nuking your family and would have your grandparents, parent and aunts and uncles fall on you like a ton of bricks. You couldn’t turn in your husband and cut off his family because it’s your blood family too.

Exactly. There is also evidence some Muslim girls were groomed in-community too. Hugely closed-in and tight-knit religious communities often enable abuse...

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=www.mwnuk.co.uk/go_files/resources/UnheardVoices.pdf&ved=2ahUKEwiOn8is4KqSAxU3YEEAHXUXEZgQFnoECCcQAQ&usg=AOvVaw3Hw9uNMmyuZFBMiOsoOyfh

https://www.google.com/url?opi=89978449&rct=j&sa=t&source=web&url=https%3A%2F%2Fwww.mwnuk.co.uk%2Fgo_files%2Fresources%2FUnheardVoices.pdf&usg=AOvVaw3Hw9uNMmyuZFBMiOsoOyfh&ved=2ahUKEwiOn8is4KqSAxU3YEEAHXUXEZgQFnoECCcQAQ

YourOnMute · 27/01/2026 03:30

Traveller peer led health projects have been working in this area in Ireland for at least 20 years (I remember hearing about this as a young person) and cousin marriage is becoming less common. An issue is that the Irish Travelling community is so small that if you wish to marry within your community there is a higher chance of genetic diseases.
It's also becoming more common to marry outside the community, which was absolutely unheard of when I was young.

Zanatdy · 27/01/2026 03:44

My DC’s cousins (dad’s side) are children of first cousins. Thankfully they are healthy, but obviously only by luck. I cannot imagine my eldest son, and my niece ever thinking of each other in a romantic sense as they are a year apart and grew up together. I’d be extremely shocked (not least as my DS is gay!) if they announced they were a couple and i’d advise them to have genetic testing before having children.

DC’s cousins parents have been happily married for 30yrs and I was not aware for many years they were first cousins, probably as i’d made a comment about someone I worked with being married to a first cousin and how odd it was to me, so ex DP didn’t tell me. In fact he never has, I found out from conversations with ex SIL. It was their parents who drove the relationship as ex SIL was only 16 when she was brought to the UK (from South East Asia). Maybe the idea was to give her a better life and that was the way.

As I say, they are very happy, but there have been explosive family arguments over that 30yrs. Mostly driven by ex MIL’s horrible treatment of her DIL / niece (you’d all be open mouthed at the MIL stories I have, certainly not petty), so that’s definitely one down side of marrying in the family, big drama. They are a lovely family and genuinely the kindest people I know, even 15yrs after ex and I split, they still invite me over and are so hospitable and if I was ever in trouble, they’d be the first people to come. Genuinely lovely people.

Overall, I feel it should not be allowed when we have the medical evidence of how damaging it can be. I know in some UK areas there’s been a lot of education re genetic testing which does help a little. I’d imagine it’s rare outside of South East Asian culture and hope it dies out given the education young people have around it now in the UK.

Bringemout · 27/01/2026 04:29

Most of the Muslim girls I grew up with had zero desire to marry their cousins so I think in a few generations it will sort itself out anyway. My only concern is people performing a nikkah without a civil marriage which is not great for women if it were banned. Is it Denmark who banned cousin marriage because they think it will reduce clan based criminality? I definitely struggle to not see this is stomach churning (not muslim, absolutely banned in my religion) but so did many of my muslim friends. I don’t think there are loads of young men and women who are really super keen.

I’m asian and grew up in a very asian place, some families would have agreed marriages so cousins would be able to migrate to the UK. It often meant british muslims were stuck with spouses that grew up in very different environments with very different cultures and expectations. The changes to overseas spouses rules definitely meant a few men and women breathed a sigh of relief.

This is going to be controversial but here goes, communities where there are high pairings of british raised plus foreign spouses who are related to them will struggle to move forward culturally on womens rights etc. You just have waves of more conservative people embedding conservative views in the new families they create. The grooming gangs scandal really highlighted how these networks of cousins functioned, high loyalty to the clan, low empathy for anyone outside the clan. They abused as families. You saw this in the level of abuse coming from women in these families directed at the victims instead of shame and embarrassment (not saying women are responsible for mens actions but damn right I’d be fucking ashamed if a man in my family did those things) which would be more the norm.

Reducing chain migration is one way to shift the dial on that and I actually think it’s one of the reasons the rules were brought in the first place. I don’t think most british born asians want a foreign spouses unless they are someone they fell in love with themselves anyway. For most women anyway it’s not appealing, for some men it may be because they believe they will have more control of their wives.

Mapletree1985 · 27/01/2026 04:36

ComtesseDeSpair · 26/01/2026 19:52

In the U.K. we both didn’t have or want to think about it much until recently: culturally, cousin marriage hasn’t been generally practiced; and ultimately those who did practice it more (nobility) would historically have been among those with the greatest weight against rejecting any legislation around it.

I think it’s also quite a complicated thing for any modern government to legislate against explicitly on the grounds of it resulting in disabilities and health problems. Saying “it isn’t right to marry and have children knowing there will be a significant chance of them being born disabled” opens the door to there also being an insinuation, or an accusation that it is also being suggested that perhaps other people should be prevented from marrying and having children - such as people with conditions with a known genetic cause or heritability.

Edited

Maybe this is a discussion we need to have.

ThatNiftyBlueSwan · 27/01/2026 04:58

Queen Victoria married her first cousin- was not seen as a problematic issue.

Sophiablue95 · 27/01/2026 05:31

My ex MIL who is Arab said inbreeding amongst cousins is a good thing because it makes the blood stronger. 😂

I think they should be warned when marrying a cousin that any offspring with genetic birth defects/disorders will not be treated on the NHS and they must pay privately. When I lived in the Gulf, you had to pay to get a blood test before marriage to check for any genetic disorders. They should be made to do the same at their own expense.

If you harmed your baby in the womb with alcohol or drugs, surely the social would get involved. Why isn’t it the same for inbreeding and causing genetic disorders?

Such wreckless behaviour and all stems down to greed. They want to keep the land and money within the family name. Poor children.

Akils · 27/01/2026 05:35

My DH is from a South Asian family. His parents are absolutely against this even though it is "permitted" in their culture and to my knowledge his wider family too.

They are not all like this.

Diblin93 · 27/01/2026 05:43

steff13 · 26/01/2026 19:47

I'm in the US, so I don't super pay attention, but I did read an article within the past week or two that someone from the NHS was telling midwives that there are benefits to first cousin marriage and that the drawbacks are not so bad. I'll see if I can find the article.

I read that article too