 For instance, when many people make similar reproductive choices, the resulting “baby boom” may reshape the social, economic, political, and environmental landscape. Such concerns apply to the use of ARTs, such as for sex selection: sex ratios might become grossly skewed in countries with a strong preference for male children (Xue 2010). Such societal consequences are also predicted by disability theorists who argue that normalizing genetic testing and embryo selection or abortion to prevent certain impairments could lead to increased stigma against and decreased resources for people with such impairments (see also the entry on  disability).  Such concerns might provide grounds for restricting ARTs or incentivizing their use.