Results: 
In total, 355 patients underwent MVR at our center, of whom 174 received a bioprosthesis and 181 received a mechanical prosthesis. The use of anticoagulation among young women with mechanical prosthesis was associated with a remarkable risk of postoperative bleeding, abortion, and increased frequency of pregnancy-related complications (p < 0.0001). In contrast, there was a considerable survival benefit for those who received bioprosthesis (p = 0.0001).
Conclusions :
Our data confirm that the use of mitral bioprosthesis in young women who desire to become pregnant is safe, reduces complications, and increases survival.
Key words : cardiac valve prostheses, mitral valve replacement, biological valve, mechanical valve