> They analyzed data from the British Household Panel Survey — a study of British families who have been interviewed once a year since 1991 — and found that fathers with three sons and no daughters were far more likely to vote for conservative candidates than were fathers of three daughters and no sons.
But a counter-argument:
“Recent studies seem to prove that women with higher levels of testosterone — who are more likely to display dominant, positive behaviours — seem to produce more sons than daughters. Women with lower levels of testosterone, who are more likely to be empathetic and better listeners, tend to produce more daughters. It could be that the women who are most likely to produce daughters pick a partner who is closer to her more empathetic attitude to life. Hence people who are already more liberal may produce more daughters and those who are already conservative may produce more sons.” (Source)