Raw Milk back to pasteurized

I was making kefir with pasteurized milk for about two weeks and absolutely loved it. I recently switched to raw milk to see the difference in taste and i really enjoy it, but the difference is minimal and not worth the extra cost imo.

My question is if i want to switch back to use pasteurized milk, do you think my pregnant wife would be able to drink this kefir even though the grains, at one point, were feeding on raw milk? should i wait a couple of batches or should i get new grains and start over?