Some studies have reported decreases in the ratio of males to females at birth in different countries around the world over
time, and suggest that environmental hazards, such as exposure to endocrine disrupting chemicals, can affect how many males
are born. Typically, about 5% more male infants are born than female infants.
Sex Ratio among Singleton Births by Year, New Jersey, 1990-2007
Ratio of males to females at birth for resident singleton births in a time period
How We Calculated the Rates
Numerator:
Number of singleton males born to residents in a time period
Denominator:
Number of singleton females born to residents in a time period
Page Content Updated On 05/06/11,
Published on 05/06/11
Center for Health Statistics, New Jersey Department of Health, PO Box 360, Trenton, NJ 08625-0360, Phone: 609-984-6703, Fax: 609-984-7633, e-mail: chs@doh.state.nj.us,
Web: www.nj.gov/health/chs
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