Pregnancy outcomes can vary for singleton and multiple births. Multiple births include twins, triplets and higher order births, and outcomes can vary among these groups as well.
Last updated:
January 2022
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In Iowa in 2021, 96.4% of all live births were singleton births and 3.6% were multiple births.
Between 2011 and 2021, the multiple birth ratio in Iowa increased more than 5%.
Compared with singleton births (one baby), multiple births in Iowa were about 7 times as likely to be preterm in 2022.
Notes: Multiple deliveries include twin, triplet and higher order deliveries.
Sources: National Center for Health Statistics, final natality data. Retrieved March 19, 2024, from www.marchofdimes.org/peristats.
In Iowa in 2021, the multiple birth ratio was 36.0 per 1,000 live births.
In Iowa during 2019-2021 (average), the multiple birth ratio (per 1,000 live births) was highest for black infants (44.9), followed by American Indian/Alaska Natives (44.6), Whites (34.8) and Asian/Pacific Islanders (18.7).