Choosing a Valve Prosthesis for a Successful Pregnancy. The "Tip of the Iceberg" for a Disease of Complex Evolution.

Background: The choice of valve prosthesis in women planning a pregnancy is still controversial. The durability of biological prostheses and the characteristic thrombogenic of mechanical prostheses are limitations to the pregnancy's successful Objectives: To study the pregnancy success rate after valve prosthesis implantation, and identify the variables related to maternal outcomes.

Methods: Prospective study with 78 pregnant women with bovine pericardial prosthesis (Group BP) and 50 with a mechanical prosthesis (Group MP), who received prior guidance on the risks of pregnancy.