Risk factor | Points | |
Age | ||
< 35 years | 0 | |
≥ 35 years | 1 | |
Multiple pregnancies | ||
Single | 0 | |
Twin, Triplet | 1 | |
PAH | ||
No | 0 | |
Yes | PIHa | 2 |
Preeclampsia | 4 | |
Eclampsia or Superimposed preeclampsia | 4 | |
Rheumatic diseaseb | ||
Yes | 1 | |
No | 0 | |
Transfusion in a previous pregnancy | ||
Yes | 2 | |
No | 0 | |
Total points | Estimated risk (%) | |
0 | 0.18% | |
1 | 0.44% | |
2 | 1.03% | |
3 | 2.43% | |
4 | 5.58% | |
5 | 12.32% | |
6 | 25.04% | |
7 | 44.26% | |
8 | 65.37% | |
9 | 82.78% | |
10 | 91.43% |