Interesting new research! –

Women who believe themselves to be wealthy could be more likely to have boys, and that is a significant factor behind Australia’s bucking of global declining male birth rates, new research suggests.

ACT’s high male birth rate bucking trendTheory has evolutionary linksAcross the world the male birth rate is declining, and the trend would also hold true in Australia if not for the ACT, where boys are born at a much higher rate. Over a period of 12 years, researchers from the Australian National University (ANU) analysed birth rates across Australia, and found that in most states boys were being born at a rate of 105 per 100 girls, but in the ACT that number was closer to 110.

Lead researcher Alison Behie said the findings seemed to bear out the Trivers-Willard theory, which suggests mothers’ circumstances can play a role in determining a baby’s sex. She found women who perceived themselves as well off were more likely to have boys, linking the phenomenon to the higher-than-average socio-economic status of ACT residents.

Source: Babies’ sex could be influenced by mother ‘feeling richer’, ANU researchers suggest – ABC News (Australian Broadcasting Corporation)