“…Even in Sweden, where legislation giving donor offspring the right to obtain information about the donors' identity came into force in 1985, more than a decade later, only 11% of parents had informed their children of their donor conception . Investigations in the United States have produced comparable findings, with rates of disclosure to the children reported to range between 14% and 30% (Leiblum & Aviv, 1997;Nachtigall, Tschann, Szkupinski Quiroga, Pitcher, & Becker, 1997). When questioned about their reasons for secrecy, parents in the European Study of Assisted Reproduction Families reported concern that their children would be upset, shocked, and confused by the knowledge that their fathers or mothers were not genetically related to them (Cook, Golombok, Bish, & Murray,1995;Golombok et al, 1999).…”