The expected sex ratio at birth (male to female) is 1.05, or 5% more males born than females. Population growth is, in part,
related to the number of live male children. Numerous studies have reported changes in the ratio of males to females at birth;
many of the studies have found a reduction in male relative to female births in different countries throughout the world.
Sex Ratio at Birth by Year, 1989-2006
Office of Vital Records and Statistics, Utah Department of Health.
The sex ratio at birth is the ratio (comparison) of male to female births. The expected sex ratio at birth (male to female)
is 1.05, or 5% more males born than females.
How We Calculated the Rates
Number of live male births in a specific period of time; number of live female births in a specific period of time.
Total number of live births in a specific period of time.
Page Content Updated On 10/06/2008,
Published on 10/30/2008
Utah Environmental Public Health Tracking Network, Utah Department of Health, P.O. Box 142104, Salt Lake City, UT 84114-2104, Telephone: 801-538-6191, Fax: 801-538-6564, Email:
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