ONE SPERM DONOR, 150 Offspring. “Today there are 150 children, all conceived with sperm from one donor, in this group of half siblings, and more are on the way. ‘It’s wild when we see them all together — they all look alike,’ said Ms. Daily, 48, a social worker in the Washington area who sometimes vacations with other families in her son’s group.” There was something like this on Hot In Cleveland, with the sperm donor being Wayne Knight.