- In their yearly letter, Bill and Melinda Gates called personal DNA tests like the child 23andMe offers the second-biggest surprise of 201
- The Gateses shined a spotlight on the tests' surprising utility in two divergent areas – crime and maternal health.
- "We didn't see this coming," the Gateses wrote at the top of their annual letter.
It's going to be a big year for at-home DNA tests. The spit-in-a-tube kits, which offer the ability to learn more about your heritage and, to a lesser extent, your health, have spiked in popularity in recent years.
And now that at least 19 million people have used Ancestry and 23andMe's kits, Bill and Melinda Gates are shining a spotlight on their surprising utility in two fairly divergent areas: crime and maternal health. In their yearly letter, the Gateses called genetic tests are the second-biggest surprise of 2018.
"We didn't see this coming," the Gateses wrote at the top of their letter.
Last year, law enforcement officials used test results from the free genetic research service GEDmatch to help home in the lead suspect in the Golden State Killer case, Joseph James D'Angelo. By uploading DNA from one of the killer's crime scenes to GEDmatch's database and cross-referencing what they found on roughly the data in census rolls and death certificates, they located D'Angelo and arrested him.
"When police used Genesis test results to catch the Golden State Killer [suspect] last year, the story made headlines around the world, "Bill Gates wrote in the letter.
The use of genetic data in the Golden State Killer case hit a nerve with many people, from experts and experts to consumers who have already taken or may take the tests.
Read more: drug giant. Here's how to delete your data if that freaks you out
Many were concerned that the genetic data they shared with a DNA testing company could be subject to use by police. And as it turns out, the testing service Family Tree DNA has previously compiled with law enforcement requests to look at its data, BuzzFeed News reported. However, other personal DNA testing companies – including Ancestry and 23andMe – said they have not shared any of their data with police and would not be in the future. Business Insider took a deep dive into each company's policy here.
But the Golden State Killer case was "not the only discovery to come out of home DNA tests."
In addition to being used in forensics, personal genetic tests are yielding some intriguing health-related findings.
Read more: Genetic testing is the future of healthcare, but many experts say companies like 23andMe are more harm than good
One of those has to do with maternal health. After scanning the identified genetic samples of more than 45,000 women who had taken a 23and test, researchers found by the gates found a potential link between preterm birth (birth before 37 weeks) and several genetic variants, or tweaks on genes that can differ from person to person. Their results were published in the New England Journal of Medicine in 2017.
One of the variants the scientists found at a gene that plays a role in the body's use of an essential mineral called selenium. Researchers still need to do a lot more research before they learn exactly if, how, and why the mineral affects the risk of preterm labor. But the Gateses said they believe the early recovery helps put scientists on the right path to a potential solution. "Better tools and more data sharing mean that we're finally starting to understand what causes babies to be born early – and what we can keep them in the womb longer, "Bill Gates wrote.