Multiple Birth Statistics
Statistic Verification
Source: CDC, Gold Coast Multiple birth, NOMOTC
Research Date: 1.1.2014
A multiple birth occurs when more than one fetus is carried to term in a single pregnancy. Different names for multiple births are used, depending on the number of offspring. Siblings created from one egg are commonly called identical. Since identical multiples share the same genetic material, they are always the same sex. Multiples called polyzygotic represent some combination of fraternal and identical siblings. For example, a set of triplets may be composed of identical twins from one egg and a third sibling from a second egg.
Multiple Births By Year200920102011
Twin Births137,217132,562131,269
Triplet Births5,9055,5035,137
Quadruplet Births355313239
Quintuplets or Higher803769
Other Multiple Birth StatisticsData
Triplet or higher birth rate per 100,000 live births137.6
Twin birth rate per 1,000 live births33.1
Total percentage of Twins as result of fertility treatments17%
Total percentage of triplets as result of fertility treatments40%
Total percentage of twins born to women over the age of 4520%
Percent of teen mothers who have twins2%
Percent of twins born with low birth weight57%
Percent of triplets born with low birth weight96%
Total number of live multiple births143,557
Percent of twins that are left handed22%

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