S13 Ep2: Donor Unknown: "Hello, I'm Your Sister. Our father

Aired: 10/20/2011 | 0:03:26 | Clip
When one girl discovered a unique online registry that connects donor-conceived children, she managed to track down a half-sister in New York. The New York Times picked up the story and, over time, 12 more half-siblings emerged across the United States.

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