Table 2.
Exclusion criteria
| • |
Unsure of LMP and unwilling to have USS at ≤ 20 weeks |
| • |
≥ 3 miscarriages |
| • |
≥3 terminations |
| • |
Known or suspected major fetal anomaly/abnormal karyotype |
| • |
Essential hypertension treated pre-pregnancy |
| • |
Moderate-severe hypertension at booking (BP >160/100 mmHg) |
| • |
Diabetes |
| • |
Renal disease |
| • |
Systemic Lupus Erythematosus |
| • |
Anti-phospholipid syndrome |
| • |
Sickle cell disease |
| • |
HIV positive |
| • |
Major uterine anomaly |
| • |
Cervical suture in situ |
| • |
Knife cone biopsy |
| • |
Long term steroids |
| • |
Treatment with low-dose aspirin |
| • | Treatment with heparin/low molecular weight heparin |