My wife and I have a 10 month baby and my wife is pregnant again. Is it normal for her health?
I think you may mean is it good or bad for her health to have a pregnancy quickly after her last delivery. Pregnancy itself is generally a normal phenomenon.
In terms of interpregnancy intervals, we generally advise 18 months in between deliveries at a minimum, it sounds as though her deliveries will likely be spaced about that far apart.