PRospective Evaluation of Peripartum Anticoagulation ManaGement for ThrOmboembolism

Inclusion Criteria: * 18 years of age or older * Requires anticoagulation during the antepartum period of pregnancy for a VTE indication, including at least one of: 1. Objectively confirmed VTE (DVT, superficial vein thrombosis \[SVT\], PE or unusual site thrombosis) diagnosed during the current pregnancy; 2. Objectively confirmed VTE diagnosed in a prior pregnancy; 3. Objectively confirmed VTE diagnosed when not pregnant; 4. Inherited or acquired thrombophilia requiring anticoagulation. * Receiving any dose or type of LMWH during the antepartum period Exclusion Criteria: * Anticoagulation for a non-VTE indication, including prosthetic heart valves, atrial fibrillation, prevention of placenta-mediated pregnancy complications, or prevention of recurrent pregnancy loss (participants can be included with a diagnosis of antiphospholipid syndrome (APS) with or without thrombotic events) * Unable to provide or declined consent. * Home or birthing centre planned delivery.