DNA testing is radically reshaping the definition of family

In the 1970s, Robert Jenkinson was newly married with a daughter, looking for a job and in need of extra cash. He settled on sperm donation as a way to allay the last of those concerns while helping other families have children. He never could have expected that, because of DNA testing, the day would come when he would be contacted by the children he helped create. Needless to say, neither could anyone else, including the sperm banks that historically promised anonymity to donors…