As family reunions go, it is sure to rank among the less conventional. Six teenagers across America conceived from the same sperm donor have finally met their biological father after he decided to reveal his identity. Jeffrey Harrison, whose offerings once ranked among California Cryobank’s most sought-after specimens, made himself known after reading a newspaper article about two teenage girls who had found out they had both been conceived with sperm from “Donor 150†– and wanted to get in touch with the man in question. With a profile billing him as a blue-eyed, 6-feet-tall lover of philosophy, music and...