No you can't
MDA means Minimum Descent Altitude. You cannot descend below this altitude unless adequate visual reference is achieved.
DA means Decision Altitude. This is the altitude that the decision is made to go around. You will descend slightly below this altitude in a go around.
In my company, when conducting a NPA there is an auto call-out of "Hundred above" when there is 100 feet to go to the MDA. We count to two seconds and if not visual, push the thrust levers forward and go around. From the call of "Hundred above" and two seconds thereafter, we ensure that at no time we descend below the MDA.