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Table 1 Gestational Age-Specific Numbers and Rates of Perinatal Death among Male 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)†
28 648 6,808 263 122.2 3,841,944 0.24
29 579 8,100 221 92.2 3,834,488 0.21
30 701 11,297 230 77.6 3,825,809 0.24
31 668 14,339 208 58.4 3,813,811 0.23
32 809 20,242 209 48.4 3,798,804 0.27
33 786 30,140 212 32.3 3,777,753 0.26
34 881 51,673 298 22.4 3,746,827 0.31
35 915 86,166 338 14.4 3,694,273 0.34
36 1,033 154,986 354 8.9 3,607,192 0.38
37 1,144 308,629 394 5.0 3,451,173 0.45
38 1,173 626,450 470 2.6 3,141,400 0.52
39 1,122 925,764 541 1.8 2,513,777 0.66
40 897 848,527 431 1.6 1,586,891 0.84
41 469 444,468 237 1.6 737,467 0.96
≥42* 454 292,076 229 2.3 292,530 2.33
Total‡ 17,680 3,888,014 8,800 6.8 3,905,694 6.78
  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.