Table 3.
Selected adverse pregnancy outcomes and gestational length at any future pregnancy by three aspects of pregnancy loss history at first parity, National Survey of Family Growth 1995 through 2011–2013
| Pregnancy loss history at first parity | n (%) | Any future preterm birth |
Any future stillbirth |
Any future low birthweight |
Any future adverse outcome* |
Gestational length, weeks† | |
|---|---|---|---|---|---|---|---|
| (n = 2270) | (n = 498) | (n = 1658) | (n = 3186) | ||||
| % (SE) | % (SE) | % (SE) | % (SE) | n | Mean (SE) | ||
| All future pregnancies | 15,979 (100.0) | 14.0 (0.4) | 2.6 (0.2) | 9.7 (0.4) | 19.1 (0.5) | 14,281 | 38.6 (0.03) |
| Number of pregnancy losses | |||||||
| No loss | 14,341 (88.9) | 13.8 (0.5) | 2.6 (0.2) | 9.9 (0.4) | 19.1 (0.5) | 12,878 | 38.6 (0.0) |
| 1 loss | 1,385 (9.3) | 15.5 (1.7) | 2.4 (0.5) | 9.0 (1.3) | 19.7 (1.7) | 1194 | 38.5 (0.1) |
| 2 losses | 189 (1.3) | 12.4 (3.5) | 1.0 (0.5) | 7.0 (3.2) | 13.8 (3.6) | 159 | 38.8 (0.2) |
| 3 or more losses | 64 (0.5) | 20.2 (8.9) | 10.3 (5.4) | 7.6 (3.2) | 29.6 (9.0) | 50 | 38.0 (0.6) |
| At least 1 loss | 1,638 (11.1) | 15.3 (1.5) | 2.6 (0.5) | 8.7 (1.2) | 19.4 (1.6) | 1403 | 38.5 (0.1) |
| Gestational age of pregnancy loss(es) | |||||||
| All < 6 wk | 247 (1.6) | 13.2 (3.8) | 1.0 (0.6) | 8.4 (2.9) | 16.4 (3.8) | 221 | 38.5 (0.3) |
| Longest 6–9 wk | 669 (4.4) | 15.7 (2.1) | 1.6 (0.6) | 7.6 (1.5) | 18.3 (2.2) | 565 | 38.5 (0.1) |
| Longest ≥ 10 wk | 722 (5.1) | 15.6 (2.5) | 3.9 (0.9) | 9.8 (2.0) | 21.2 (2.7) | 617 | 38.5 (0.1) |
| Recency of last pregnancy loss‡ | |||||||
| Within last 6 mo | 601 (4.0) | 13.5 (2.4) | 2.6 (0.7) | 9.6 (2.3) | 17.7 (2.5) | 524 | 38.6 (0.1) |
| 6 to 11 mo ago | 297 (2.1) | 13.1 (2.8) | 2.3 (1.0) | 6.7 (2.3) | 17.8 (3.1) | 252 | 38.5 (0.2) |
| 12 to 23 mo ago | 303 (2.1) | 15.1 (3.0) | 3.0 (1.1) | 12.3 (2.9) | 20.4 (3.2) | 259 | 38.5 (0.3) |
| 24 mo or more ago | 377 (2.5) | 18.9 (3.0) | 2.9 (1.1) | 5.6 (1.3) | 21.8 (3.1) | 324 | 38.4 (0.2) |
Unweighted sample size with population weighted percentages and standard errors.
*
Any future preterm birth, stillbirth, or low birthweight infant reported.
†
Among only future pregnancies that resulted in live birth.
‡
Excludes 84 first parities with most recent pregnancy not a pregnancy loss.