Further evidence of male offspring preference for certain subgroups in the United States (2007-2015)

Asians favour male offspring. This group may be systematically implementing foetal sex-specific feticide and/or implementing a Type1 stopping rule when a male birth is achieved in order to maximise male births. The potential putative effect of increasing maternal age to decrease M/T is not only excluded in this race, but goes contrary to the findings of this study insofar as Asian or Pacific Islander births have the oldest mean maternal ages. Son preference strongly persists in the US.