Ethical Questions Raised Over Single Sperm Donor's Copious Offspring

The New York Times: One Sperm Donor, 150 Offspring, by Jacqueline Mroz:

Cynthia Daily and her partner used a sperm donor to conceive a baby seven years ago, and they hoped that one day their son would get to know some of his half siblings — an extended family of sorts for modern times.

So Ms. Daily searched a Web-based registry for other children fathered by the same donor and helped to create an online group to track them. Over the years, she watched the number of children in her son’s group grow. . . .