Births by Sex Ratio
Updated February 23, 2017 | Factmonster Staff 
The Question:
What is the ratio of males to females at birth in the U.S.?
The Answer:
According to the CIA World Factbook, as of 2011, there are 1,047 males born per 1,000 females.
Here is a link to our Live Births by Sex and Sex Ratio chart. See how this data has fluctuated since 1983.
-The Fact Monster
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