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Associations Between Climate, Latitude, Fertility And The Decline Of The Us Sex Ratio At Birth, Michael C. Meyers
Associations Between Climate, Latitude, Fertility And The Decline Of The Us Sex Ratio At Birth, Michael C. Meyers
Doctoral Dissertations
The US sex ratio at birth (SRB) has declined since 1970, while ambient temperatures have been increasing. This study examines the temporal and spatial variation of the US SRB from 1979–2002 in association with fertility rates and climate variables. Approximately 62.8 million birth records from the National Center for Health Statistics were linked to monthly climate division data and county level socioeconomic variables to evaluate the association of SRB and environmental conditions at or near the time of conception.
Seasonal variation in US SRB is detectable in time series analysis, and is somewhat in phase with variation in fertility. Logistic …