April 17, 2014

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Multiple deliveries: US, 2001-2011

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• In the United States in 2011, 96.5% of all live births were singleton births and 3.5% were multiple births. 
• In the United States in 2011, the multiple birth ratio was 34.6 per 1,000 live births. 
• Between 2001 and 2011, the multiple birth ratio in the United States increased more than 8%. 
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•  Multiple deliveries include twin, triplet and higher order deliveries.
•  National Center for Health Statistics, final natality data.
•  Retrieved April 17, 2014, from www.marchofdimes.com/peristats.

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