Hi lily_81 ,
If the Hb isn't low (below the 9-9.5 range) there won't be much added iron absorption, so the ferritin shouldn't be high. For the most part, thal minor and iron issues are not related.
Small red blood cells will not create thin blood. In fact, the misshapen blood cells can tend to cause more barriers to normal blood flow. Vitamin E is a very important antioxidant and is regularly recommended with thalassemia. Deficiency is common, especially when thal is involved. The need for many nutrients increases with thal, even in minor.
A main reason miscarriages happen in some thal minors is a reduced flow of blood between the uterus and placenta due to the hypercoagulable state that exists in thalassemia, which is more commonly found in intermedia and major, but does also become a problem for many thal minors during pregnancy. Vitamin E can help keep the blood thinner, promoting the proper flow of blood. Sometimes, one baby aspirin per day will be advised by the doctor during pregnancy.