 One reason for prohibiting anonymous gamete donation is the distress that advocates of disclosure claim many donor-conceived children suffer as a consequence of the absence of identifying information about their biological progenitors. This distress is sometimes referred to as ‘genealogical bewilderment’, a term originally coined in reference to the distress experienced by adoptees, and its symptoms are said to include difficulty developing a personal identity that feels genuine, anguish about not knowing the identity of one’s genetic relations, and an obsession with trying to find out information about one’s genetic relations (Sants 1964; Cahn 2009b). Advocates of the right to know point to both scientific studies and general social observations, such as the rise of services to help donor-conceived individuals find their biological relations, as evidence of the severity of this harm (McWhinnie 2001; Frith 2001; Ravitsky 2010).