It’s a good idea to visit the dentist when you’re pregnant. This is because the hormones circulating in your body can affect your gums. Your gums are more likely to bleed and there is a greater chance of them becoming inflamed or infected. Having a gum infection can lead to your teeth being damaged. You're also more likely to get a build-up of plaque (a type of bacteria) on your teeth. Serious gum infections are called gingivitis or periodontal disease.If you're finding it difficult to stay healthy, this can affect the way your baby grows.