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Krista and Tatiana Hogan

Krista and Tatiana Hogan
Born Krista and Tatiana Hogan
(2006-10-25) October 25, 2006 (age 10)
Vancouver, Canada
Residence Vernon, British Columbia
Nationality Canadian
Parent(s) Brendan Hogan and Felicia Simms
Website Tatiana & Krista Facebook

Krista and Tatiana Hogan (born October 25, 2006) are Canadians who are conjoined craniopagus twins. They are joined at the head (the top, back, and sides). They were born in Vancouver, British Columbia and are the only unseparated ones of that type currently alive in Canada. They live with their mother, Felicia Simms, in Vernon, British Columbia and often travel to Vancouver for care at BC Children's Hospital and Sunny Hill Health Centre for Children.

Based on statistics, the twins were given a 20% chance of survival at birth. At birth at B.C. Women's Hospital & Health Centre, they were described as "wriggly, vigorous and very vocal." They weighed twelve and a half pounds, not six and a half pounds as reported by some media outlets, when they were born by caesarean section.

Tatiana is smaller and less robust than Krista. Tests on them in April 2007 showed that Tatiana's heart was working harder than Krista's and that she had high blood pressure because of it—Tatiana's heart was supplying part of the blood to Krista's brain. A surgery was planned to give Krista's heart a "jump start" so Tatiana's would not have to work so hard.

The twins' nervous systems are highly interconnected; their doctors reported that when one of them is tickled, the other jumps, and that putting a pacifier in the mouth of one could cause the other to stop crying.

The twins' birth, potential separation, depth of community support and their family's financial situation have been subject to significant media coverage in Canada. They and their mother were also guests on The Tyra Banks Show in the U.S..

In August 2007, it was declared the twins cannot be separated, due to the likelihood of the surgery killing or paralyzing one or both girls.

The family reduced the twins' public profile due to a contract giving exclusive access to a documentary crew for National Geographic and the Discovery Channel UK. The show was broadcast first in Britain in spring 2010, and then aired in June in Canada and the U.S.

The documentary followed a year in the twins' life and included a "particularly poignant" meeting between the family and Lori and George Schappell, 51, the world’s oldest twins to survive being joined at the head.


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