Everyone born from a donor might have siblings they had no idea existed, who were born from the same stranger. Here, a man gets instant results putting his DNA on websites.

The extraordinary story of brother and sister Tom and Isabel as they trace their donors and one of them learns of a story that is the stuff of sci-fi.

Corinne discovers that she could be one of multiple half-siblings born to the same donor. This is a very real phenomenon for donor conceived people.

Today, we meet Amanda, who has put off searching until now because she's worried about the impact on her mum and dad, and Adam, whose parents talk openly about the experience.