Kris,
I just read this post to my wife. We're very sorry you had to go through this very difficult experience. My wife clotted with a second generation mitral St. Jude valve in 1999 when she was pregnant with our son. She took Lovenox from six weeks until delivery, and had blood tests, which were based on her weight only.
When we discovered she was pregnant again in 2006, we decided to go through everything under the direct supervision of her team of doctors. She was on Lovenox the first trimester, followed by Coumadin in the second trimester. Things became very complicated when she went into pre-term contractions at 24 weeks and was placed in the hospital for six weeks with a Heparin pump. Willow went into heart failure at 30 weeks due to a clot on the mitral valve. She had her fourth valve surgery two days following delivery of our daughter.
We had several doctors that helped with our pregnancy. We had the director of OB care, director of cardiology, director of hematology, and the USC Cardiology research team. Even with daily blood monitoring, factor X's, then heprin on a IV pump and several echos she clotted. Yet, the same doctors were able to successfully deliver women with aortic valves. Dr. Elkayam, USC Cardiology Research, has a lot of data regarding valve pregnancies. He has been researching this issue in women from all over the world for years. The data shows that the highest point of risk is at the third trimester due to the increase of blood flow through the heart. Both St. Jude and On-X valves are great, but we feel neither will work in the mitral position during a pregnancy. Personally, we would never try with a tissue valve either. Though of the three that would be the best in our opinion.
We're grateful that God blessed you to pull through your difficult experience and that you have a lovely baby boy to show for your efforts. You definitely deserve all the best and your story is in our hearts.
God bless,
Anthony and Willow
October 2006 MVR ON-X Valve
September 1999 MVR St. Jude
August 1993 MVR St. Jude
January 1993 MV Repair