“…Current data support that human birth sex ratios are affected by the childhood experience of parents (Song, 2014). Further, members of human communities are often concious of, and concerned about, local sex ratio bias (Mackenzie et al, 2005;Shrivastava et al, 2014Shrivastava et al, , 2015, which can lead to deliberate measures to alter sex ratios towards equality (Hesketh et al, 2011;Hesketh & Min, 2012;Zhou et al, 2012b;Bhattacharya, 2013), while other members of a population may be seeking to increase the probablity of producing offspring of a particular sex by the various means available to them (Madan & Breuning, 2014;Guilmoto, 2015). Sex-specific abortion has been a common method in some societies and has led to sex ratio skew in several countries (Hesketh & Min, 2012;Zhou et al 2012b;Madan & Breuning, 2014;Song, 2014) but ART could potentially be empoyed, generating considerable ethical concerns (Guilmoto, 2015).…”