After a woman is pregnant, her body will generally change greatly and her teeth will also be affected. Orthodontics can be done during pregnancy, but it is not recommended. During orthodontic treatment, some things should be avoided, and more things can't be eaten, which may not keep up with all aspects of nutrition. Moreover, tooth decay and periodontal problems are prone to occur during orthodontic treatment. Tooth decay during pregnancy is incurable, so orthodontics during pregnancy is not recommended.