How do we know which baby will be suffered from hgb e/beta thal disease? any chances about my 1st baby?bcoz we are e trait and beta thalassemia couple

It's random: Each time you conceive a child, a random assortment of genes from each parent goes into making up junior's genome. This is basic biology but still often needs to be reviewed. It's good for folks with any thal variant to take enough folate, (folic acid) but you should be taking that iron if and only if you are actually iron deficient or clearly need to supplement. Glad you're learning and proactive. Good luck.