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Male live births slightly exceed female live births. This is usually expressed as M/F, the ratio of male to total live births. A multitude of external influences have been shown to reduce this ratio, including stress provoked through witnessing violent events; M/F dips occur three to four months later. The April 1992 Los Angeles riots constituted six days of extreme civil unrest in the city of Los Angeles. This study was carried out in order to ascertain whether M/F dipped in California following this event.

The Male-female Birth Ratio in California and the 1992 April Riots in Los Angeles