With the web, curiosity and luck, sperm donor siblings connect - CNN.com

With the web, curiosity and luck, sperm donor siblings connect - CNN.com: Fifteen years ago, sperm donation enabled two mothers to give birth to the children they always wanted. Now the internet age has allowed their twins to find each other. Their connection happened partly from persistence and partly from luck in 2007. The two families had joined the Donor Sibling Registry online, where they found their half siblings by searching for families with a matching donor identification number.