 Some go further, arguing that donor selection for the purpose of disability-avoidance is not merely permissible but, in certain circumstances, obligatory (see, for example: Savulescu 2001; Savulescu &amp; Kahane 2009; Harris 1985, 2002; Buchanan et al 2000; Glover 1989; Glover 2006). Discussions regarding this matter have tended to focus less on gamete donor selection and more on the selection of embryos and fetuses through pre-implantation and pre-natal genetic diagnosis. However, as Holm and Bennett (2014) and Williams (2017) note, arguments suggesting a moral obligation to select against disability in these contexts apply to gamete donor selection too.