The article focuses on the experimental approach of Jill Ginsberg, Children's Hospital of Philadelphia (CHOP)'s pediatric oncologist, to study the prepubescent tissue of young boys with cancer. It says that Ginsberg provides parents with options of allowing their son to be a subject of a surgery as part of an experimental protocol or to avoid such decision. It adds that not all experts view the approach as a positive development and that not all boys are sterile after chemotherapy.