Back in 2007 I read the article, "Sperm Donor Father Ends His Anonymity"
in the New York Times about a gentleman who'd been a sperm donor in the 1980s, whose specimens were, shall I say, quite appealing to the sperm bank's clientele. Jeffrey Harrison was one of the California Cryobank's most requested donors - and known only by number (he was Donor 150) to the moms-to-be and, subsequently, to their children.
Turns out, given Mr. Harrison's profile popularity, there were quite a few children.
As the kids got older, many wondered about who their father was. An earlier story, published in the Times mentioned that some of the children had connected through the Donor Sibling Registry, a Web site that helps donor offspring learn about their genetic roots. Several discovered that Donor 150 was the father. This was covered in an earlier story, "Hello, I'm Your Sister. Our Father Is Donor 150."