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, 1990-2009
The information provided above is from the New Jersey Department of Health's
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from New Jersey Department of Health, Center for Health Statistics,
State Health Assessment Data Web site: http://nj.gov/health/shad".