Instead, she gave birth to four babies.
Doctors say the fourth child had been hiding the entire time. The quadruplets, two girls and two boys, weighed nearly five pounds each.
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The couple has already picked out three names, Tristan, Erik, and Clare.
The family is still deciding on a name for the fourth surprise.
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Vivian and her husband now have seven kids total.
This is the first time in the hospital's 98-year history that quadruplets were born there.
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