Hi Sumit,
Welcome on the forum,gene therapy is in trials right now and not available as a cure,stem cell transplant will also need a donor just like BMT.
How much do you know about BMT? To tell you the truth BMT itself is a very risky process,there are a couple of our members who opted for BMT and they can tell you what they went through and how hard it was,our member Khalifa's son's BMT failed first time.
Now a days thalassemia is a very manageable disorder,with proper knowledge of how to deal with things,with good supplementation,on time transfusions and regular chelation one can live a fairly normal life,we have members who are in their 40's and living a healthy life,one of them just had her second baby
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I know picture painted by the doctors is very grim,i have a thal daughter she is on regular transfusions,i remember when she was diagnosed i was obsessed with a cure,i just felt like my daughter can not live with thal,she needs a cure,and ofcourse cure was BMT,we had a son after her but he was not genetically matched.Then i calmed down and then i found this site,which changed my whole perspective towards thal,i have learn a lot from here and you'll find that true for your self if you keep reading the posts,i consider my daughter a very healthy child Alhumdulillah,you can see her in the gallery and tell me what do you think
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Still if you want to go for BMT,i'd advise to opt for IVF and PGD and have a thal free and genetically matched baby and then go for a transplant rather then opting for an unmatched BMT.
Good luck
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Zaini.