Skip to main content

Table 2 Gestational Age-Specific Numbers and Rates of Perinatal Death among Female Singleton Births, United States, 1997 and 1998.

From: Customized birth weight for gestational age standards: Perinatal mortality patterns are consistent with separate standards for males and females but not for blacks and whites

Gestational age Stillbirths Live births Early neonatal deaths Perinatal mortality rate (1)† Fetuses at risk Perinatal mortality rate (2)†
28 614 5,838 184 123.7 3,665,497 0.22
29 530 7,000 158 91.4 3,659,045 0.19
30 611 9,742 179 76.3 3,651,515 0.22
31 578 12,493 173 57.5 3,641,162 0.21
32 632 17,168 195 46.5 3,628,091 0.23
33 654 25,282 187 32.4 3,610,291 0.23
34 747 44,275 221 21.5 3,584,355 0.27
35 796 75,238 234 13.5 3,539,333 0.29
36 874 133,386 286 8.6 3,463,299 0.33
37 927 267,501 337 4.7 3,329,039 0.38
38 1,071 563,676 361 2.5 3,060,611 0.47
39 1,072 885,523 419 1.7 2,495,864 0.60
40 926 851,848 376 1.5 1,609,269 0.81
41 505 455,313 222 1.6 756,495 0.96
≥42* 443 300,234 198 2.1 300,677 2.13
Total‡ 15,537 3,707,616 6,614 6.0 3,723,153 5.95
  1. † Total births at each gestational week served as the denominator for perinatal mortality rates (1), while perinatal mortality rates (2) were calculated using fetuses at risk as the denominator (see text). All rates are expressed per 1,000.
  2. * Large increase in perinatal mortality (2) at ≥42 weeks is partly because the period of risk exceeds 1 week (see also Figures 3-5).
  3. ‡All gestational ages, including those ≥22 weeks and those with missing gestational age.