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Obstetrics & Gynaecology Haematology Strong — RCOG Green-top GTG37a

VTE Risk in Pregnancy (RCOG)

RCOG Green-top assessment for VTE risk in pregnancy/puerperium to guide LMWH thromboprophylaxis.

Antithrombin deficiency, APLS, compound heterozygous FV Leiden/prothrombin

Cancer, heart failure, SLE, IBD, sickle cell, IV drug use, nephrotic syndrome

Score interpretation

Low Risk 0–1

Low VTE risk in pregnancy.

→ No pharmacological prophylaxis required antenatally. Encourage mobilisation. Reassess if hospitalised.

Intermediate Risk 2–3

Score 2–3: Intermediate risk.

→ Consider LMWH from 28 weeks. Postnatal LMWH for 10 days. If hospitalised: start LMWH immediately.

High Risk 4–99

Score ≥4: High risk.

→ Antenatal LMWH throughout pregnancy. Postnatal LMWH for at least 6 weeks. Haematology review. Consider compression stockings.

Interpretation bands for the VTE Pregnancy. Apply clinical judgement and local guidance.

References

Related

Curated clinical cross-links plus same-class fallbacks.

Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.