Antenatal & maternal medicineFree in the app
VTE risk assessment
Score at booking, on admission and after birth.
Source: RCOG GTG 37a + 2026 position statement Calculator
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Thresholds
| Antenatal ≥4 | LMWH from first trimester. |
|---|---|
| Antenatal 3 | LMWH from 28 weeks. |
| Postnatal ≥2 | LMWH ≥10 days. |
| High risk | 6 weeks postnatal (e.g. previous VTE). |
| BMI ≥50 | LMWH whole pregnancy + 6 weeks. |
Points (2026)
| 4 | Previous VTE; surgery; OHSS; systemic infection; immobility/dehydration; BMI ≥50 |
|---|---|
| 3 | High-risk thrombophilia; medical comorbidity; hyperemesis; VTE after major surgery |
| 2 | CS in labour; BMI 40–49 |
| 1 | Age >35, BMI 30–39, parity ≥3, smoker, varicose veins, pre-eclampsia, IVF, multiple pregnancy, elective CS, rotational/mid-cavity birth, labour >24 h, PPH >1 L, preterm, stillbirth |
A summary for trained clinicians. Always check the full guideline, the patient in front of you and your hospital's protocol. Spotted an error? Tell us.