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Uptodate Reference Title
Infant, neonatal, postnatal mortality per 1000 live births by plurality
Infant, neonatal, postnatal mortality per 1000 live births by plurality
Infant deaths (birth to 1 year)
Neonatal deaths (birth to day 28)
Postneonatal (day 29 to 1 year)
Singletons
11.2
7.8
3.4
Twins
66.4
55.9
10.5
Triplets*
190.4
168.8
21.6
Calculated from US Vital Statistics, 1998 and from US Public Health Service. Healthy People 2000: National Health Promotion and Disease Prevention Objectives, DHHS Pub. No. (PHS)90-50212. Washington, DC: US Department of Health and Human Services, Public Health Service; 1990.