Lorena,
There is no official research to show that thal minors have a high rate of miscarriages, but from the countless reports I have heard through this site, I have to say that thal minors have a high rate of miscarriages and a rate of multiple miscarriages that is not even close to normal. There are known factors in thalassemia major and intermedia that are proven to contribute to miscarriage and from the many reports I have heard either through posts or personal messages, I have to say that thal also causes many miscarriages in minors. Vitamin E and possibly an aspirin per day can help avoid this, as these are clotting issues that lead to miscarriage. Blood clotting occurs between the uterus and placenta and eventually the placenta begins to separate, resulting in termination of the pregnancy by the body. Because of the abnormal shape and size of the red blood cells and also because the bodies of thals do not produce equal quantities of alpha and beta globin, there is always an excess of one of the chains, even in minor. These excess globin chains form tetramers that along with the misshapen blood cells basically clutter the bloodstream, and this can cause clotting issues in thals. Using mild blood thinners like natural vitamin E and an aspirin a day can help keep the blood thinner and less likely to clot. As I mentioned before, folic acid is an absolute must for all thals, but especially when alpha is involved. Iron should not be taken unless iron studies show you are also iron deficient. Giving iron when not needed is very common in alpha thal. It cannot help unless you are also iron deficient and long term use causes iron to build up in the body, which can lead to all sorts of problems. Ask the hematologist to run iron studies to see if iron is needed before taking more iron.