i dont know the answer to if acetone is safe in pregnancy but i would think if it wasnt it would be quite well known please dont quote me on that. acetone is in most nail polish removers.

acetone is the only way sweet i been a nail tech for many years and im sorry to say it this is the only way i know. I would NOT rip or pick them off you may wreck your nail bed or your matrix. I would let it grow out cutting it or soak them off.