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Article  Incest: DNA tests uncover that it's far more widespread than previously thought

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C C Offline
https://www.msn.com/en-us/news/us/ar-BB1k6mNN

EXCERPT: . . . She confirmed what he had already suspected: His birth mom was the second woman. But Moore had another piece of news too. She had unexpectedly figured out something about his biological father as well. It looks like your parents are related. Steve didn’t know what to say. Do you understand what I mean? He said he thought so. Either your mom’s father or your mom’s brother is your father.

A sea of emotions rose to a boil inside him: anger, hurt, worthlessness, disgust, shame, and devastation all at once. In his years of wondering about his birth, he had never, ever considered the possibility of incest. Why would he? What were the chances?

In 1975, around the time of Steve’s birth, a psychiatric textbook put the frequency of incest at one in a million.

But this number is almost certainly a dramatic underestimate. The stigma around openly discussing incest, which often involves child sexual abuse, has long made the subject difficult to study. In the 1980s, feminist scholars argued, based on the testimonies of victims, that incest was far more common than recognized, and in recent years, DNA has offered a new kind of biological proof. Widespread genetic testing is uncovering case after secret case of children born to close biological relatives—providing an unprecedented accounting of incest in modern society.

The geneticist Jim Wilson, at the University of Edinburgh, was shocked by the frequency he found in the U.K. Biobank, an anonymized research database: One in 7,000 people, according to his unpublished analysis, was born to parents who were first-degree relatives—a brother and a sister or a parent and a child.

“That’s way, way more than I think many people would ever imagine,” he told me. And this number is just a floor: It reflects only the cases that resulted in pregnancy, that did not end in miscarriage or abortion, and that led to the birth of a child who grew into an adult who volunteered for a research study.

Most of the people affected may never know about their parentage, but these days, many are stumbling into the truth after AncestryDNA and 23andMe tests. Steve’s case was one of the first Moore worked on involving closely related parents.

She now knows of well over 1,000 additional cases of people born from incest, the significant majority between first-degree relatives, with the rest between second-degree relatives (half-siblings, uncle-niece, aunt-nephew, grandparent-grandchild). The cases show up in every part of society, every strata of income, she told me.

Neither AncestryDNA nor 23andMe informs customers about incest directly, so the thousand-plus cases Moore knows of all come from the tiny proportion of testers who investigated further. This meant, for example, uploading their DNA profiles to a third-party genealogy site to analyze what are known as “runs of homozygosity,” or ROH: long stretches where the DNA inherited from one’s mother and father are identical.

For a while, one popular genealogy site instructed anyone who found high ROH to contact Moore. She would call them, one by one, to explain the jargon’s explosive meaning. Unwittingly, she became the keeper of what might be the world’s largest database of people born out of incest.

In the overwhelming majority of cases, Moore told me, the parents are a father and a daughter or an older brother and a younger sister, meaning a child’s existence was likely evidence of sexual abuse. She had no obvious place to send people reeling from such revelations, and she was not herself a trained therapist. After seeing many of these cases, though, she wanted people to know they were not alone.

Moore ended up creating a private and invite-only support group on Facebook in 2016, and she tapped Steve and later his wife, Michelle, to become admins, too. The three of them had become close in the months and years after the search for his birth mom, as they navigated the emotional fallout together... (MORE - missing details)
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#2
stryder Offline
(Mar 19, 2024 07:21 PM)C C Wrote: ...
She now knows of well over 1,000 additional cases of people born from incest, the significant majority between first-degree relatives, with the rest between second-degree relatives (half-siblings, uncle-niece, aunt-nephew, grandparent-grandchild)
...
There are Avunculate marriages. (wikipedia.org) Although rarer in recent years, and they are difficult to identify via paperwork as the families likely hid the finer details up at the time, which makes it that much more difficult historically to piece together outside of DNA testing.
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