Washington State Twin Registry

12/16/2025

These French fraternal twins are both allergic to the sun, and were told by doctors they wouldn’t make it to adulthood. New technology has allowed them to continue living their lives as (mostly) normal.

11/24/2025

"I know we're now 80, but if you don't keep moving, and you don't eat well and exercise, your body's not going to work."

The sisters, who have taught for decades, say age is not a barrier to sport.

11/17/2025

As identical twins, the Luster sisters show how impossible it is to isolate a single cause driving cancer in young adults, and how devastating it can be for patients at a crucial life stage. Brinlee's diagnosis changed the trajectory of her life as she navigated surgeries, bills, and fertility treatments to preserve her hopes of having a family. Mariela tried to stay on track with her own plans, starting a career, and later moving to a new city with her husband, while quietly shouldering survivor's guilt.

One twin got colon cancer at 21. The other didn't. Their story illustrates the mysterious nature of the rise of colon cancer in young adults.

11/26/2024

Sierra and her identical twin sister Sienna (Sinny) set the record for rarest type of discordant twinning and sharing the greatest height differential between living identical twins — and they're both featured in this year's special edition to celebrate the 70th anniversary of Guinness World Records. Sinny was born with primordial dwarfism, a condition that impacts fewer than 200 people worldwide. As a result, she is over one foot shorter than her identical twin.

Sienna and Sierra Bernal share two twinning world records: rarest type of discordant twinning and the biggest height differential between living identical twins.

10/31/2024

Happy Halloween! 🎃🎃

Did you and your twin coordinate costumes this year? Share your photo in the comments!

10/16/2024

The global average birth rate for twins is around 12 per 1,000 births - but in Igbo-Ora, it is thought to be closer to 50 per 1,000!

The global average birth rate for twins is around 12 per 1,000 births -- but in Igbo-Ora, it is thought to be closer to 50 per 1,000, according to scientific studies and hospital records.

09/28/2024

If you live near a Shawn O’Donnell’s restaurant, you and your twin can each get dinner and a soft drink for free! Now through October 1st.

This weekend we're celebrating our Twin's, Grace and Shawn, turning 2! We thought we'd bring back one of our favorite promotions from last year - Twin's Eat Free! Enjoy two dinners and a soft drink on us, both twins must be present. Now through Tuesday, October 1st. Tag your twin friends!

Speaking of Dublin' the Fun we're doing a FLASH SALE on GIFT CARDS! Buy a $20 Gift Card and get it DOUBLED to $40! Limit one per guest, in store only, today through Tuesday, October 1st.

09/05/2024

Please note: the following study is not a WSTR study, we are sharing information to individuals who may be interested.

Have you ever had a mind-to-mind connection?

Do you ever know or feel what someone else feels or thinks? Do you frequently feel connected to a twin or loved one even when you haven’t seen or communicated with them in some time? IONS is looking for identical twins or emotionally bonded pairs to investigate the phenomenon of mind-to-mind communication. If you have experienced such “telepathic” instances, we invite you to take part in this study. This study’s overall goal is to select 100 pairs of people with strong telepathic-type bonds to participate in future neuroscience studies aimed at investigating this mode of
communication.

Who can participate?
● Identical twins or emotionally bonded pairs over the age of 18
● Those who can read and write fluent English
● Those with secure access to the internet and be comfortable with performing online tasks
● People who have experienced two or more instances of telepathic connections that both members of the pair can confirm

You can learn more about the study at the IONS website. https://www.research.net/r/Mind2Mind_1

08/20/2024

Recent data show that the upward trend in twin births may be falling. After years of climbing, the US twin birth rate began to slowly fall in the 2010s, with its most dramatic drop (7 percent) occurring from 2019 to 2020

Two BU-affiliated researchers, one the CAS Twin Project director, explain how a local school graduated 23 sets of twins in a single class

07/22/2024

Identical twin sisters from Detroit recently celebrated their 100th birthday! Growing up, the two say they did everything together. Today, they still do everything together.

Living to see 100 years old is a beautiful thing. On Wednesday, two Detroit women celebrated their 100th birthday.

07/15/2024

For the first time since 1996, a pair of twins will be competing together in the Olympics! The 24-year-olds will compete in badminton doubles, which starts on July 27th.

As the twins prepare to head to Paris for the 2024 Olympics, what is clear is that these identical twins should not be underestimated. The 24-year-olds will compete in badminton doubles and are the first twins to compete in a U.S. Summer Olympics team since 1996.

06/27/2024

Lois Lasher and Lori Hoots slept side-by-side in the same crib as babies. Nine decades later, the identical twin sisters still share a queen bed. Beyond the companionship, the sisters support each other with their health challenges - having each other has made getting older easier.

Twins Lois Lasher and Lori Hoots said their own children, when they were young, often could not tell their mothers apart.