News for hackers. Stuff that matters.

A comment on Divergence in U.S. Sex Ratios by County, 1820–2010.

Re:Divergence in U.S. Sex Ratios by County, 1820–2010 by ccvannorman on Thursday May 07, 2015 @02:08PM (#9507057)
National flip from predominantly male to female happened around 1950, just after WW2.
[ Parent | on HN ]
Re:Divergence in U.S. Sex Ratios by County, 1820–2010 by ginko on Thursday May 07, 2015 @03:33PM (#9507668)
It was a combination of WW2 and penicillin severely reducing the mortality rate of childbirth.
[ Parent | on HN ]