The donorsiblingregistry.com is The Donor Sibling Registry it was founded in September 2000 by Wendy Kramer and her son Ryan. Ryan was a child born from a sperm donor as a father and wished to form a way online to contact donors and possible family members - Ryan knew that there was no online way in contacting his father and similarly he knew that other donors children were faced with the same consequence, Ryan and his mother state that “we started this site as the logical next step to making those connections!” with the current Active membership (paying and non paying members) in the Donor Sibling Registry is currently at 13084 with matches between more than 5263 half-siblings (and/or donors) facilitated.

This is a unique concept and way to register anonymously and publicly, also for contacting possible off spring at a future date.