J Reprod Med
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To examine the occurrence of multiple births among adolescents using birth as the unit of analysis and to examine the association between maternal race/ethnicity and parity and the occurrence of multiple births among women less than 20 years of age. ⋯ This is the first study showing ethnic and racial differences in the rates of multiple births among teenage mothers. As in older women, increased age and a higher parity were associated with a higher probability of multiple birth among adolescents.