Kendra and Maliyah, conjoined twins

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Halfway through her pregnancy, Erin and her husband Jake were given shocking news: A routine ultrasound discovered that they were having twins...and they were conjoined. After a difficult pregnancy, Kendra and Maliyah were born, joined at the pelvis and chest. They shared a large intestine, bladder, liver and single kidney.

Then, when they were 4 years old, the girls were separated after 16 hours of high-risk surgery. The twins celebrated their good news with Oprah in January 2007.