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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:
Thread gallery
16
rickyrickygrimes · 27/01/2026 06:04

When we visited Iceland we were told that third cousin marriage is the absolute limit, and most people prefer fourth to be safe. There’s even a database where you can check how closely related you are to your date - if you dont already know as it’s such a small, enclosed population.

ohfook · 27/01/2026 06:10

Playingvideogames · 26/01/2026 21:20

Indeed.

Imagine standing up in the British Parliament in 2025 to argue for cousin marriage.

Sick

He didn’t argue in favour of cousin marriage he argued in favour of a strategy that he believed would work better than an outright ban. I’m guessing because he is familiar with the community and understands what would and wouldn’t work.

sashh · 27/01/2026 06:13

shuggles · 26/01/2026 20:21

I don't understand what the fuss is about. Charles II of Spain's parents were close relatives and he turned out fine.

Edited

Queen Victoria and Prince Albert were first cousins, not all of their children were healthy.

It isn't a single marriage that is usually the problem it is when a number of generations intermarry, the gene pool gets smaller and smaller.

Try this to illustrate the problem, get a plate, salt and pepper. Put roughly even amounts of salt and pepper on the plate and mix them up. That's the genetic mix of the first generation child. Take a teaspoon of the mixture out, that's your first child.

Now add more salt and mix in, take a teaspoon of the mix out, then add more salt, and take a teaspoon out, and more, keep going.

Eventually your teaspoon will only contain salt.

There are a few things causing problems. The small gene pool that is getting smaller.

Families used to be able to make a match with a bride of groom in Pakistan who might be as closely related. That is not an option now.

The Muslim faith (or how it is interpreted) teaches that you must not use contraception, and also that having a disabled child is a blessing.

MindYourUsage · 27/01/2026 06:18

iamDebbie · 26/01/2026 23:29

Where did i say they should be banned from receiving treatment?

I said the parents should be liable for the medical costs of any inbreeding related medical issues.

If they knowingly reproduce with first and second cousins with all the known risks, why should the taxpayers foot the medical bills?

They ignored the facts and made the choice to reproduce. If their children are disabled as a result of their poor choices, they should be made to pay any medical bills. This might make them think twice.

Look at the previous example of the 6 disabled children all needing transplants. Why is this the responsibility of the tax payers? Why did they go on to have SIX disabled children? How is that fair on those poor children and the system thats forced to help them?

You know full well that they cannot or will not pay the medical bills for medical issues as a result.

When that happens, who suffers?

The child with the medical issue.

You're crazy (and cruel) and I'm out.

Daygloboo · 27/01/2026 06:27

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.

It was in some countries historically to preserve land in families etc. Keep wealth in side the family. But that seems irrelevant nowadays so i dont think it should still be happening.

Itsmetheflamingo · 27/01/2026 06:33

iamDebbie · 26/01/2026 23:29

Where did i say they should be banned from receiving treatment?

I said the parents should be liable for the medical costs of any inbreeding related medical issues.

If they knowingly reproduce with first and second cousins with all the known risks, why should the taxpayers foot the medical bills?

They ignored the facts and made the choice to reproduce. If their children are disabled as a result of their poor choices, they should be made to pay any medical bills. This might make them think twice.

Look at the previous example of the 6 disabled children all needing transplants. Why is this the responsibility of the tax payers? Why did they go on to have SIX disabled children? How is that fair on those poor children and the system thats forced to help them?

can you not see it’s a bit of a daft suggestion though? How is your average family going to pay for 6 kidney transplants? So the children die untreated?

loislovesstewie · 27/01/2026 06:42

I agree with you completely. I think it's time we made cousin marriage illegal. I can remember many years ago there was a campaign explaining the risks of marrying cousins. We haven't really progressed and, as others have noted, the problem isn't the occasional 1st cousin marriage it's the fact that it carries on through the generations with the gene pool getting progressively smaller. In addition many religious people feel that it's the will of God if they have disabled children. It's almost a fatalistic response.
In trying not to upset certain communities we are actually ruining lives.

Amberlynnswashcloth · 27/01/2026 06:42

This must be an issue about lack of education about the risks. If the goal of cousin marriage is the protect the family line and provide financial security then surely no culture in the world would believe that having multiple, severely physically and educationally disabled children would achieve this. A health campaign in effected communities might achieve more than a ban.

TwentyTwentyTwenty · 27/01/2026 06:48

7238SM · 26/01/2026 19:54

I used to volunteer in a special needs school when doing my degree in a different field. I was shocked at how many severely disabled siblings were at that school- all from consanguineous marriage. One family had 6 children- all non verbal, most couldn't walk and no chance they'd ever live an independent life.

Same here. I'd say about 80% of children were born from cultures that practice consaguinitous marriage. I voiced my opinion on this once and was told that this isn't something open for discussion. My neighbours are from Pakistan (I am white but live in a mostly South Asian neighbourhood) They have 3 children. The two eldest are boys and hardly a week would go by without an ambulance being called. There are both in special schools. Their daughter is about 12 months old and so far seems to bee fairing well. My neighbour, child's dad said he felt blessed that he and his wife were able to have children as they were 6th generation cousins and some of his relatives were unable to conceive. They are from a huge family, very pleasant and neighbourly by mu God, most of the kids ( and many of the adults) have the most awful birth defects. Severe dwarfism,learning difficulties, mobility issues, physical abnormalities. When my siblings got married in Europe they and their future spouse had to take dna tests ( France) this was 30 odd years ago. I think us British are too bloody scared of being told we're being racist. There's nothing racist about baning incest.

loislovesstewie · 27/01/2026 06:48

Amberlynnswashcloth · 27/01/2026 06:42

This must be an issue about lack of education about the risks. If the goal of cousin marriage is the protect the family line and provide financial security then surely no culture in the world would believe that having multiple, severely physically and educationally disabled children would achieve this. A health campaign in effected communities might achieve more than a ban.

There have been campaigns with mixed results.

Hangerbout · 27/01/2026 06:50

Not sure if this is already mentioned, but in the following countries cousin marriage is illegal:

China: first cousins
South Korea and north korea: first, second and third cousins
Taiwan: first and second cousins
Philipines: first cousins
Norway: first cousins
Sweden and Denmark: legislation re first cousins in the pipeline
Many states in the US: first cousins
Uzbekistan: legislation re ALL blood relatives in the pipeline

ChaToilLeam · 27/01/2026 07:01

There were cousin marriages in certain families where I grew up. And kids with birth defects - never seen the like of it anywhere else. 😔 Feel so sorry for those kids.

TwentyTwentyTwenty · 27/01/2026 07:03

For decades, probably centuries, inbreeding of livestock and pets was discouraged because of the known rsk of birth defects so whis is first couin marriage still allowed in the uk?

TheignT · 27/01/2026 07:06

Namingbaba · 26/01/2026 20:04

For those like Keir Starmer saying education is the way to go rather than a ban, are they actually doing anything about it? As has already been posted the NHS had material saying their were benefits like social and family ties.

The odd cousin having kids together usually doesn’t cause issue but if your parents were first cousins and your cousin who you’re marrying is also born of cousins then it just becomes further and further inbreeding.

Yes I thought as a one off it wasn't an issue but it happening over multiple generations was dangerous. I do know one couple who are cousins white British but it is unusual.

TheignT · 27/01/2026 07:08

Hangerbout · 27/01/2026 06:50

Not sure if this is already mentioned, but in the following countries cousin marriage is illegal:

China: first cousins
South Korea and north korea: first, second and third cousins
Taiwan: first and second cousins
Philipines: first cousins
Norway: first cousins
Sweden and Denmark: legislation re first cousins in the pipeline
Many states in the US: first cousins
Uzbekistan: legislation re ALL blood relatives in the pipeline

Wouldn't that be hard to enforce? I've got no idea who my third cousins are. Would you have to produce family trees to prove it,?

Namingbaba · 27/01/2026 07:09

Thoseslippers · 26/01/2026 23:56

Exactly this. This is NOT the issue and blanket making cousin marriage illegal would target people like you for absolutely no reason. I can't agree with it because it removes some peoples freedoms and rights and to what end? It wont really target the communities where this is happening. And it will be extremely sad for people who just happen to fall in love with their cousin. Why should we throw those people under a bus just to feel like we are tackling a problem we wont really be tackling anyway??

What about other people who fall in love with a family member where it is illegal to marry them?

Simplelobsterhat · 27/01/2026 07:10

Carla786 · 27/01/2026 02:47

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

Oh yes, I'd forgotten that bit. But I think it was more of a 'thank goodness the boys won't want to marry her if we bring them up together, because if they met later in life they probably would want to, and she's too low class'. So the possibility of cousin marriage being likely in general is implied, just not, as you say, if they are brought up more like siblings.

Also lady Catherine de bourgh intends her daughter for her first cousin Mr Darcy, with little negative comment on that aspect of the potential relationship from anyone.

TheMrsCampbellBlack · 27/01/2026 07:15

It's interesting to consider which countries and religions practice this and how much that impacts their mental functioning and their success as an individual and as a whole population. No way in gods green earth would I even dream of shagging anyone in my own family 🤢

bananafake · 27/01/2026 07:15

Namingbaba · 26/01/2026 20:04

For those like Keir Starmer saying education is the way to go rather than a ban, are they actually doing anything about it? As has already been posted the NHS had material saying their were benefits like social and family ties.

The odd cousin having kids together usually doesn’t cause issue but if your parents were first cousins and your cousin who you’re marrying is also born of cousins then it just becomes further and further inbreeding.

Exactly. It’s what happened in the Spanish royal family centuries ago where the inbreeding led to profound physical and mental development issues over several generations.

Simplelobsterhat · 27/01/2026 07:18

Carla786 · 27/01/2026 02:53

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!

Edited

No i agree he doesn't groom her sorry, I just found on a re read knowing what's coming, that the early part where he is so much older and playing an almost paternalistic role a bit icky! There's such a power imbalance. Which i think is in real life a potential issue with marriage within families as well as the genetics.

And I agree about Emma even though they are not genetically related. I hope their children don't marry her sisters children though - double first cousins!

Seriously, I know I've gone down a fiction rabbit hole, but these many examples in literature which are not portrayed as negative or unusual, coupled with royalty like queen Victoria, and the people I and others know, does suggest it was more common place in UK within the past few hundred years than some people realise. I'm surprised so many people on here didn't know it was legal.

SpanThatWorld · 27/01/2026 07:18

freakingscared · 26/01/2026 23:33

Loving parents do not put their children at risk !! And obviously this needs to be done properly and in time but inbreeding needs to stop or do you think it’s fair for the kids ? The law needs to be updated and anyone not respecting it after it passes should be made a example !

This is hysteria

The vast majority of kids born to first cousin marriages are fine.

Who else is "putting their kids at risk" and needs to have them taken away as a lesson to the rest of us?
Women marrying men with ASD traits?
Women over 35?
Deaf people marrying other Deaf people?

One of the arguments against specialist schools for Deaf children was that Deaf people would marry other Deaf people and thereby have more Deaf children. Not all Deaf people see Deaf children as a disaster.

mids2019 · 27/01/2026 07:19

Make it illegal.

The problem with guidance and education is that guidance and education may be against deep rooted and cultural norms. If someone is religious NH S guidance isn't going to change their views of religious dogma or centuries of cultufe.

Not all cultures are equal and we as a country need to move swifter and be more decisive when it comes to calling out practises that are by one the pale.

MichaelScarns · 27/01/2026 07:20

I always thought we couldn't really make it illegal because of the queen and Phillip.

Bringemout · 27/01/2026 07:20

Daygloboo · 27/01/2026 06:27

It was in some countries historically to preserve land in families etc. Keep wealth in side the family. But that seems irrelevant nowadays so i dont think it should still be happening.

This was never really true, in south asia women generally don’t inherit and divorce would just leave you destitute. No woman whether she’s your cousin or not, easily takes wealth away from any of the male line of a family. It’s a nonsense argument.

Plus if it were true we could see that people who marry their cousins are significantly more wealthy. You are more likely to end up poorer because people start suffering from ill health and cognitive damage.

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