Hi Aleena, first off, welcome to Thalpal.
I am a Thal Major teen, 17 years old. Well, my face and all is normal, you cannot identify me as a thal major if you look at me (thanks to my parents for nice care).
I understand that times like these might make you emotionally very sad and might break you apart. But as a sufferer of Thal major, I know what consequences I had, have and would have to face in future as well. There are certain problems your child would have along with some expensive treatment costs and medications, if you're able to manage it financially. The bones may or may not be week, your child may not have adequate height or growth as generally Thal majors are low in stature (if a child is well maintained, he or she may achieve his/her height & puberty but a few years later than other normal kids) and such teen years may break apart your child's feelings and emotions. This all would happen due to IRON OVERLOAD that your child, being a thalassemia major would receive blood transfusions every 15-21 days, which in turn is a source of IRON and it would get deposited every time your child transfuse. Also this iron, if in excess amount is deposited in various organs like heart, pancreas can cause temporary or permanent organ failures (for example, I acquired diabetes due to iron deposition on my pancreas). To remove this EXTRA IRON induced as a result of transfusion, there are iron chelators in liquid (sub cutaneous) and ORAL form introduced by reputed companies like Novartis but it's a long term and continuous no-way-out process to chelate regularly.
So overall, there are more CONS than pros. So I would NOT suggest bringing the child and along with him/her a lot of miseries that he would need to face, into this world. I know it can be an intense emotion breakdown, but you would be doing for your baby only. You would save him/her from troubles he/she will undergo through his/her whole life.
Do decision wisely, we're all with you.
-Pratik.