Table 1.
Maternal characteristics of singleton pregnancies complicated with HDP via IVF or NC
| IVF-HDP group(n = 102) | NC-HDP group(n = 1028) | P value | |
|---|---|---|---|
| Maternal age (years) | 32.50(30.00, 37.00) | 30.00(26.00, 34.00) | < 0.001 |
| Advanced age(≥ 35 years) n (%) | 37 (36.27) | 243 (23.64) | 0.005 |
| Gravidity n (%) | 0.546 | ||
| 1 | 38 (37.25) | 374 (36.38) | |
| 2 | 26 (25.49) | 230 (22.37) | |
| 3 | 20 (19.61) | 180 (17.51) | |
| ≥ 4 | 18 (17.65) | 244 (23.74) | |
| Parity n (%) | < 0.001 | ||
| 0 | 81 (79.41) | 542 (52.72) | |
| 1 | 19 (18.63) | 423 (41.15) | |
| ≥ 2 | 2 (1.96) | 63 (6.13) | |
| Pregestational obesity n (%) | 8 (7.84) | 90 (8.75) | 0.755 |
| Family history of preeclampsia n (%) | 5 (4.90) | 51 (4.96) | 0.979 |
| LDA usage n (%) | 4 (3.92) | 23 (2.24) | 0.470 |
All data are expressed as the median [25–75 percentile] or n (%) ;
Abbreviations: IVF, in vitro fertilization; NC, natural conception; PE, preeclampsia; LDA, low-dose aspirin.