Hmmm, other than thalassemia some of them also do things like ultrasound pelvic n semen analysis. Even if not having kids so soon, is better to check first? If any issues then have time to resolve it first before trying for baby ma. If only when wanna have then check, realize sth not right, end up taking more time to fix it.
If both are thalassemia carrier still can have baby, just tt there's a chance tt the baby will have thalassemia. But they can do prenatal testing to check the fetus.