Risk factors for VTE in pregnancy
| Pre-existing | New onset/transient | Obstetric |
| Previous VTE Heritable thrombophilia Acquired thrombophilia Family history of VTE Medical co-morbidities (including SLE, nephrotic syndrome, sickle cell disease, cancer, inflammatory conditions) Age >35 years BMI >30 kg⋅m−2 Parity ≥3 Smoking Varicose veins Paraplegia | Early pregnancy Hyperemesis gravidarum Ovarian hyperstimulation syndrome Throughout pregnancy Surgical Procedures (inc. ERPC, postpartum sterilisation) Admission Immobility (e.g. symphysis pubis dysfunction) Dehydration Systemic Infection Travel of duration >4 hrs | Antenatal Multiple pregnancy Assisted reproduction Therapy Pre-eclampsia Delivery Caesarean section Prolonged labour Midcavity rotational forceps delivery Postnatal Postpartum haemorrhage (>1 litre) Blood transfusion |
Data from [2].