Male-biased sex ratios in Australian migrant populations: a population-based study of 1 191 250 births 1999–2015

摘要

BackgroundThe naturally occurring male-to-female (M/F) ratio at birth is 1.05. Higher ratios found primarily in countries across Asia have been attributed to prenatal sex selection due to son preference. There is growing evidence that sex-selective practices continue following migration; however, little is known about these practices following migration to Australia.