By keeping the teeth clean, especially near the gum line, gingivitis can be prevented. When possible, you should use fluoride toothpaste at least twice daily and brush your teeth after each meal. You should also clean your dental floss thoroughly every day. If you brush your teeth and cause morning sickness, rinse your mouth with fresh water or mouthwash containing anticalculus and fluoride. Good nutrition - especially large amounts of vitamin C and B 12 - helps maintain oral health and strength. More frequent cleaning by the dentist will help control plaque and prevent gingivitis. Plaque control also reduces inflammation of the gums and reduces the likelihood of pregnancy tumors.