Figure 2: Flowchart on therapeutic options in young women with aortic valve disease and pregnancy outcomes. Patients unsuitable for valve repair underwent a preoperative anticoagulation test to rule out warfarin dosage needed to achieve postoperative target INR. Results of this anticoagulation test helped patients choose prosthetic type. Those in need of a warfarin daily dosage< 5mg were preferentially given mechanical prostheses.